PHYSICS FINAL

Why does water stay in a bucket revolving in a vertical circle?

water is falling at the same rate as the bucket

88 84 When 38Sr decays to 36Kr, a(n) ______________ is emitted.

alpha particle

which one of the two substances, water or olive oil, can store more heat than the other?

Water can store more heat than olive oil

The attraction between an object on or near Earth's surface and Earth is called_______

Weight

The bending of light because of a speed change as it moves from one medium to another is called ____________

refraction.

after changing the amplitude = 1.00 cm while keeping the frequency at 1.00 Hz, what is the wavelength value in "cm"? (approximately)

6.5

In Data Table 2, Current versus Resistance with a constant voltage of 2.0 volts, when the resistance is set at around 300 ohms, the current is around___________ mA Selected:

6.7

In Data Table 1, Voltage versus Current With a constant Resistance of 1.00 kilo ohms, when voltage is set at 7.5 volts, the current is around___________ mA

7.5

What is the % abundance of the isotope, Boron - 11, in nature?

80%

In a conductor, what are the particles that move?

Electrons

Based on the waves you just explored, what do waves represent? (note whether the medium is displaced or not)

Energy transfer

"Force of Gravity (weight) depends on the type of materials involved". Does a 100 lb. of iron weights different from a 100 lbs. of wood?

False, because 100 lb. of iron weights the same as 100 lbs. of wood

The unit for current is the _______________

ampere

In the figure included, explain the reasoning behind the charge deflection when passed through a magnetic field? Note: B: magnetic field v: velocity N: Magnet north pole S: Magnet south pole

Moving charges produce magnetic field, if the moving charge is subjected to an external magnetic field, the two fields interact generating a mutual force, this force would deflect the charge.

Which one of the two substances, water or olive oil, went through bigger change in the temperature while exposed to the same amount of heat?

Olive oil went through bigger change in the temperature while exposed to the same amount of heat as water

In wave#1 (rope like), Does the medium (dot) moved parallel or perpendicular to the wave?

Perpendicular

Explain your answer to the previous question

Power depends on work to time ratio. Hence, it is possible if his weight was bigger.

Which of the following statements is not true?

Speed is a vector quantity

Distinguish between dependent and independent variables. (The answer is in the Discussion section)

The independent variable is the variable set and varied by the conductor of the experiment. The dependent variable value changes when we change the value of the independent variable.

If you lift a 10-N weight vertically 10 m above the ground, you are _________

doing work against gravity

After completing table 2, What is the relation between current and resistance, when the voltage is constant?

inversely proportional

A possible unit of speed is___________

m/s

In pursue of scientific understanding, a hypothesis

must be substantiated by the scientific method

In our homes, the connection is:

parallel

Examine the graph you did in this lab and determine if the relationship between the circumference and the diameter is a linear relationship? (There could be more than one correct answer)

1. Yes it is linear because the slope is a constant value 2. Yes it is linear because it yields a straight line

The half-life of 60Sr is 28 y. What fraction of a sample of 60Sr will remain after 56 y have elapsed?

1/4

Which of the following four bodies has the greatest kinetic energy?

A body of mass m moving with speed 4v

Why did the bead slide down one of the spoons faster than the other two spoons?

A metal has a low specific heat value; this causes its temperature to rise rapidly when it gains heat. The high temperature will melt the butter on the spoon. While wood and plastic have high specific heat. Hence their temperature rises slower, so the butter will melt far slower.

After identifying the problem, who among the four individuals below applies the scientific method fully?

Alia does some research, develops a hypothesis then conducts an experiment.

Which of these types of radiation has the least ability to penetrate matter?

Alpha particles

Question 1 (Refer to the procedure document):you see that block#1 floats in water. What could it be made of?

Based on the image block #1 could be made of wood. Although styrofoam and ice also float, styrofoam floats a lot more than the block in the image, and ice floats a lot less than the block in the image.

"Energy can never be created or destroyed" is a statement of the law of ___________

Conservation of energy

All assessments in this course are two attempts with unlimited time, except for the__________ which is one attempt and has a time limit

Final Exam

Which of the following is not a fundamental quantity

Force

Question 2 (Referring to the floating block):What do you think will happen if you make a bigger block out of the same material? Will it float or sink?

I believe that if you make a bigger block out of the same material it will still float.

What is the relationship between natural abundance and stability?

In order for the isotope to be abundant in nature, it has to be stable

When a cobalt-60 nucleus undergoes beta decay, the nucleus formed is that of _______

Nickel-60

Walls are attracted to charged Balloons because _________

The charges in the walls are polarized

In the experiment above when you placed the 100-degree Celsius sample inside the 22 degree Celsius water (in the Styrofoam cup), how did the heat transfer and why?

The heat will transfer from the high temperature sample to the lower temperature water until they reach the same final temperature.

One of the rationales to my answer to the previous question is ______________

The particles of the medium vibrate around their equilibrium positions, but they have no displacement. Meaning they end up at their original positions.

In the experiment, after you placed the hot sample in the cold water (in the Styrofoam cup), the temperature of the water changed by 3 degree Celsius (from 22 to 25 C), while the sample temperature changed by 75 degree Celsius (from 100 to 25 C). Why did the water undergo small change in the temperature, while the sample undergo huge change in the temperature?

The sample must have low specific heat, so its temperature is very sensitive to heat exchange. While the water has high specific heat, so its temperature is resistive to heat exchange.

Why do astronauts, in their space shuttle orbiting the earth, appear to be weightless?

They are falling at the same rate as their space shuttle

Which of the following is always conserved?

Total energy of the universe

In wave#1 (rope like), What do we call this type of waves?

Transverse

Using a fridge magnet, explore the impact of the distance between the magnet and the fridge on the attraction force between them. Move the magnet further away, then close to the fridge. "The force of magnetism decreases with distance".

True, because as I increased the distance between the magnet and the fridge, the force of attraction between them decreased.

"The force of Magnetism can be blocked by certain mediums". To test it, place an inch-thick book between the magnet and the fridge, is the attraction weaker?

True, because the magnet fell toward the earth which indicated that gravity overcame magnetism as a result of the presence of the book.

Explain the rationale behind your answer to the previous question

When we doubled the number of loops from 1 to 2 or from 2 to 4, the magnitude of B was almost doubled

Explain the rationale behind your answer to the previous question

When we doubled the voltage from 2 to 4 or from 4 to 8, the magnitude of B was almost doubled

The potential energy of a pendulum is greatest_________________

at the top of its swing

A net force, bigger than zero, always produces ________________

change in the velocity

Ohm's law gives the relationship between __________

current and voltage.

If you double the distance between the two charges, the force of electricity will _____________

decrease by 1/4

An object that is moving in a linear path with an acceleration in the direction opposite to the motion has a(n) ______________ velocity

decreasing

What is bought from an electric company?

electric energy

A "kilowatt hour" is a unit that measures ______________

energy

Power is _____________

energy divided by time

Based on the results of this experiment, frequency and amplitude are______

independent on each other

The smallest number of stable nuclides belong to which category?

odd-odd

The unit of resistance is called a(n) _________

ohm.

The ______________ of a wave is the time it takes for one complete wave oscillation.

period

Wave frequency is inversely proportional to ______________

period

The most widely used source of energy in the United States is __________

petroleum

When the kinetic energy of a simple pendulum decreases, the _______________ __ of the pendulum increases

potential energy

In a transformer the input ____________ is equal to the output.

power

The primary function of a moderator in a nuclear reactor is to ___________

slow down neutrons

An automobile's acceleration may be changed by using the ______________

steering wheel

In a parallel connections, if one of the resistors is damaged the other resistors will _________ (there might be more that one answer)

still receive electric current

Energy is defined as ___________

the ability to perform work

which bead did fall first?

the bead on the metal spoon

What should be included in the subject line of any email or message sent to your instrctor

the section name which could be online 1, online2, online 3 or blended

An ac voltage can be easily increased or decreased using a __________

transformer

Light waves travel fastest in _________

vacuum.

What happens to the atomic number (Z) and the mass number (A) when a nucleus emits an alpha particle?

Z decreases by 2; A decreases by 4

Motion necessarily involves___________

a change in position

The property of a wave that is related to the brightness of visible light is ______

amplitude.

The fact that waves can be "bent" around corners is a property of waves called _________

diffraction.

After completing table 1, What is the relation between voltage and current, when the resistance is constant?

directly proportional

Based on the results of this experiment, wavelength and period are ___________

directly proportional

If the man is moving from a position of 0 m to 6.00 m in 3.00 seconds he will move __________ if he moved from a position of - 4.00 m to 0 m in 3.00 seconds.

faster than

The process of obtaining energy by splitting a large nucleus is called__________

fission

Given only the wavelength and the speed of a sound wave, the ______________ can be calculated.

frequency

What do you conclude about what we mean when we say that materials with high specific heat are thermal insulators, while materials with low specific heat are thermal conductors? (Assuming constant mass and exposure to the same amount of heat)

high specific heat materials can store heat better because their temperature is very resistive to heat exchange, while materials with low specific heat can poorly store heat because their temperature changes rapidly with heat exchange

The SI base units making up a newton are _______ (F=ma)

kilogram times meter divided by second squared)

A car is moving down a freeway in a straight line at a constant speed of 25 m/s. Its acceleration is ___________________________

zero

Two masses are initially attracted to each other by a force of 50 Newtons. These same two masses will be attracted to each other with a force of ________ Newtons if their centers be separated by a distance 10 times greater than their initial separation

0.5

Look at the figure in this question ...Using ruler (b) what is a possible reading in cm?

1.5

What is the resistance of a bulb if a current of 1 Amp passes through it when plugged into a 120 V outlet?

120 ohms

A force of 300 N is exerted on a 20 grams rifle bullet. What is the bullet's acceleration in m/s2?

15000

In trial 1 of Data Table 4-3 of Period T versus angle on earth, with constant length L = 1.00 m, constant mass m = 1.00 kg, and angle of 3 degrees. The experimental Period of the Pendulum is ____ s. (Round off the period to 2 decimal places)

2.01

What is the frequency in Hertz of radio waves produced by a radio station with a wavelength of 140 m? speed of light (electromagnetic waves) = 3.00 x 10^8 m/s MATH

2.14 x 10^6

In Data Table 1, Voltage versus Current With a constant Resistance of 1.00 kilo ohms, when voltage is set at 3.0 volts, the current is around___________ mA

3.0

In Data Table 1, Voltage versus Current With a constant Resistance of 1.00 kilo ohms, when voltage is set at 4.5 volts, the current is around___________ mA

4.5

Given the Conversion statement: 1 inch = 2.5 4cmTo convert 10 inches to cm, you have to multiply by the following conversion factor MATH

(2.54 cm divided by 1 inch )

What would be the calculations needed to evaluate the heat lost by Cd? MATH

(58.953 g) (0.232 J/g/C) (75 C)

In Data Table 1, Voltage versus Current With a constant Resistance of 1.00 kilo ohms, when voltage is set at 6.0 volts, the current is around___________ mA

6.0

With f = 2.00 Hz, v =_____________cm/s (approximately)

6.5

On a particular day the 100 watts Television was used for 3 hours.How much energy (in kWh) has been consumed?

0.3

With f = 2.00 Hz, T= ___________s (approximately)

0.5

Question (5) What can you vary in this simulation? (there might be more than one answer)

1. mass 2. volume 3. density 4. type of material

Use your calculator to evaluate the following: 2.10 x 10^-4 over divided by 5.30 x 10^-2 X 3.12 x 10^9 MATH

1.27 x 10^-12

Looking at the position of the house and the tree, if the man ran starting from the house going to the tree in 8 seconds, the average velocity would be ____________. Explain

2 m/s, we divide the distance by the time, which is 16 m divided by 8 sec

A toaster operating on 110 volts has a wattage rating of 300 watts. What is the current, in amps, flowing in the toaster?

2.73

Which of the following sound frequencies lies in the audible range?

25 Hz

In the previous question: On a particular day the 100 watts Television was used for 3 hours. Find how much is the cost in cents? (assuming an electrical cost rate of $0.10 per kWh).

3

With f = 2.00 Hz, wavelength = ________ cm (approximately)

3.2

Who invented the first battery?

Ancient Iraqis

The physical law that describes the force between charges is known as _________

Coulomb's law..

Radioactive decay was discovered in 1896 by _____________

Henri Becquerel

What is the % abundance of Beryllium-10? Is it stable?

It is unstable, its abundance is around 0%

Based on your collected data in the "field strength vs voltage" table, what is the relationship between the voltage across an electromagnet and the magnetic field strength of that electromagnet?

The magnitude of B is directly proportional to the voltage across an electromagnet.

What can you say about the relationship between the magnetic field strength and the distance from the magnet?

The magnitude of B is inversely proportional to square the distance from the magnet.

Consider a wire as in the attached figure with a current flowing through it. What will happen to the wire?

The wire will be pushed perpendicular to the plane of the magnetic field.

How does the work done in running up the stairs compare to the work done in walking?

The work is the same whether you are running or walking if the height of the staircase is the same in both cases.

Based on the results of this experiment, what should you do to fix a pendulum clock that records longer period than it should (meaning, how can you decrease the period)?

I would decrease the length

Wave amplitude is related to _____________

Intensity

(Questions 17-21 refers to the blocks displayed after you check the "Mystery" box). Refer back to the tables at the end of the lab procedure document. Object C has a mass of ________, Density of _________ , it is made of ___________and it _________ in water

Mass of 4.08 kg, Density of 0.70 g/L, it is made of gasoline and it floats in water

Questions 17-21 refers to the blocks displayed after you check the "Mystery" box. Refer back to the tables at the end of the lab procedure document. Object A has a mass of ________, Density of _________ , it is made of ___________and it _________ in water

Mass of 65.14 kg, Density of 19.3 g/L, it is made of gold and it sinks in water

A freely falling body has a constant acceleration of 9.8 m/s2 ? This means that _________

the body's speed increases by 9.8 m/s each second.

Support your answer to the previous question with the data in table 2

when we double one variable, the other was decreased by one-half. When we tripled one variable, the other was decreased to one-third of its original value, and so on.

What is the % abundance of Boron -12?

0%

A 100 watt light bulb is on for 1 hour. It will use ________KWH worth of energy during this period.

0.1

A wave with a frequency of 10 Hz will have a period of ______________ second(s).

0.1

A measurement of 0.000254 gram is the same as _______ milligrams

0.254

Determine the wavelength in meters of sound propagating from a 440. Hz tuning fork vibrating in 250C air. The speed of sound as a function of temperature is the following equation: V = 331 m/s + (0.6) T(0C)

0.79

In trial 1 of Data Table 4-1 of Period T versus length L on earth, with constant mass m= 1.00 kg, constant angle = 5 degrees, and length of 0.20 m. The experimental Period of the Pendulum is ____ s. (Round off the period to 2 decimal places)

0.90

At 1.00 Hz frequency, count the number of waves in the simulation. How many waves does the 1.00 Hz generate? (approximately

1

At 1.00 Hz frequency, measure the time to complete one wave (period) using the timer. What is the period "T" in seconds? (approximately)

1

With amplitude = 1.00 cm and frequency of 1.00 Hz, What is the period "T" in seconds? (approximately)

1

What does it mean that that water has specific heat of 4.18 joule per gram per degree Celsius?

1 grams of water needs to gain 4.18 joules of heat to raise its temperature by 1 degree Celsius.

This is a multiple answer question.. ...In washing machine, water is extracted from clothes by rapid spinning. Explain the Physics behind this process. The process could be explained in two ways. there are two possible answers, so select two from the following:

1. Using Newton's first law: objects in motion tend to keep the same velocity (moving in a straight line) so while spinning the water will continue moving in a straight line through the holes in the washing machine walls, while the clothes will be pushed back by the washing machine walls. 2. Using Newton's third law: The walls of the washing machine produce centripetal force on the clothes to keep them in a circular motion, as a reaction the clothes exert an opposite but equal force on these walls, causing the water to be extracted.

Find the right match

1. resistance=Power divided by the current squared 2.power=Voltage times current 3. voltage=Resistance times current 4. current=Voltage divided by resistance 5. energy=Power times time

When the change in the y values are increasing slower than the of change in the x-values, the graph _______________ (there could be more than one correct answer)

1. slope will decrease 2. will shift away from the y-axis

In a straight line graph of "y vs x" where y is the vertical axis while x is the horizontal axis, the slope of the graph represents (there could be more than one correct answer):

1. the change in the vertical values divided by the change in the corresponding horizontal values 2. the change in the y values divided by the change in the corresponding x values

In a series connections, if one of the resistors is damaged the other resistors will _________.(there might be more that one answer)

1. will go out 2. not receive electric current

From the graph of voltage vs current (specifically, the slope), what is the experimental value of the resistance?

1.0 kilo ohms

If the resistance of a device is 500 ohms and the current through it is 2.5 mA, the voltage across the device is ___________ volts

1.25

In trial 2 of Data Table 4-1 of Period T versus length L on earth, with constant mass m = 1.00 kg, constant angle = 5 degrees, and length of 0.40 m. The experimental Period of the Pendulum is ____ s. (Round off the period to 2 decimal places)

1.27

In Data Table 1, Voltage versus Current With a constant Resistance of 1.00 kilo ohms, when voltage is set at 1.5 volts, the current is around___________ mA

1.5

Look at the figure in this question ...Using ruler (a) what is a possible reading in cm? (you need two decimal places in the answer)

1.50

In trial 3 of Data Table 4-1 of Period T versus length L on earth, with constant mass m = 1.00 kg, constant angle = 5 degrees, and length of 0.60 m. The experimental Period of the Pendulum is ____ s. (Round off the period to 2 decimal places)

1.55

In trial 4 of Data Table 4-1 of Period T versus length L on earth, with constant mass m = 1.00 kg, constant angle = 5 degrees, and length of 0.80 m. The experimental Period of the Pendulum is ____ s. (Round off the period to 2 decimal places)

1.79

After three half-lives have elapsed, what fraction of the original amount of radionuclide remains?

1/8

In Data Table 2, Current versus Resistance with a constant voltage of 2.0 volts, when the resistance is set at around 200 ohms, the current is around___________ mA

10.0

The half-life of 60Co is 5.3 y. About how long does it take for 3/4 of a sample of that radionuclide to decay?

10.6y

The mass of a cubic meter of water is______(Given, density of water is 1000 kilogram per cubic meter)

1000 kilogram

One microsecond contains how many seconds

10^-6

Given, 1 mile = 1.609 km. Suppose the authorities decided to change speed limit signs from "miles per hour" to "kilometers per hour". You were put in charge of this task. What would you replace a 70 miles/hour sign with? (round the answer off to two non-zero digits. For example 137 is rounded off to 140). The answer would be ___________ km/hour

110

An average room is around 15 square yard in area. What is the area of this room in square foot. Given that 1 yard = 3 feet

135

Cosmic rays hitting Earth's atmosphere lead to the formation of__________

14C

What is the course policy regarding late submissions?

15% penalty per day

Based on the theoretical equation (Equation 1) in the procedure. What is the theoretical period associated with a pendulum that has a length of 1.00 m, 1 kg, and shifted 5 degrees angle? Round off the period to 2 decimal places.(Check a sample calculation in the last page of the procedure document, for a length of 0.20 m)

2.01

In trial 1 of Data Table 4-2 of Period T versus mass m on earth, with constant length L = 1.00 m, constant angle = 5 degrees, and mass of 0.30 kg. The experimental Period of the Pendulum is ____ s. (Round off the period to 2 decimal places)

2.01

In trial 2 of Data Table 4-2 of Period T versus mass m on earth, with constant length L = 1.00 m, constant angle = 5 degrees, and mass of 0.60 kg. The experimental Period of the Pendulum is ____ s. (Round off the period to 2 decimal places)

2.01

In trial 2 of Data Table 4-3 of Period T versus angle on earth, with constant length L = 1.00 m, constant mass m = 1.00 kg, and angle of 6 degrees. The experimental Period of the Pendulum is ____ s. (Round off the period to 2 decimal places)

2.01

In trial 3 of Data Table 4-2 of Period T versus mass m on earth, with constant length L = 1.00 m, constant angle = 5 degrees, and mass of 0.90 kg. The experimental Period of the Pendulum is ____ s. (Round off the period to 2 decimal places)

2.01

In trial 3 of Data Table 4-3 of Period T versus angle on earth, with constant length L = 1.00 m, constant mass m = 1.00 kg, and angle of 9 degrees. The experimental Period of the Pendulum is ____ s. (Round off the period to 2 decimal places)

2.01

In trial 4 of Data Table 4-2 of Period T versus mass m on earth, with constant length L = 1.00 m, constant angle = 5 degrees, and mass of 1.20 kg. The experimental Period of the Pendulum is ____ s. (Round off the period to 2 decimal places)

2.01

In trial 4 of Data Table 4-3 of Period T versus angle on earth, with constant length L = 1.00 m, constant mass m = 1.00 kg, and angle of 12 degrees. The experimental Period of the Pendulum is ____ s. (Round off the period to 2 decimal places)

2.01

In trial 5 of Data Table 4-1 of Period T versus length L on earth, with constant mass m = 1.00 kg, constant angle = 5 degrees, and length of 1.00 m. The experimental Period of the Pendulum is ____ s. (Round off the period to 2 decimal places)

2.01

In trial 5 of Data Table 4-2 of Period T versus mass m on earth, with constant length L = 1.00 m, constant angle = 5 degrees, and mass of 1.50 kg. The experimental Period of the Pendulum is ____ s. (Round off the period to 2 decimal places)

2.01

In trial 5 of Data Table 4-3 of Period T versus angle on earth, with constant length L = 1.00 m, constant mass m = 1.00 kg, and angle of 15 degrees. The experimental Period of the Pendulum is ____ s. (Round off the period to 2 decimal places)

2.01

In Data Table 2, Current versus Resistance with a constant voltage of 2.0 volts, when the resistance is set at around 100 ohms, the current is around___________ mA

20.0

A lady pushes a lawn mower 5.0 m on a level lawn with a force of 150 N. If 30% of this force is directed horizontally, the work done by the lady is_________ J.

225

An object has charge of negative 4.8´10^8 Coloumb, How many electrons did this object gain?(The charge of one electron is 1.6´10^-19 C, the mass of one electron is 9.1´10^-31kg)

3.0´10^27

The speed of sound at 0 C is 331 m/s". Represented in powers-of-10 notation, The speed of sound at 0 C is

3.31 ×102 m/s

A race car travels northward on a straight, level track at a constant speed, traveling 0.750 km in 20.0 s. The return trip over the same track is made in 25.0 s. What is the average speed for the total trip?

33.3 m/s

Determine the speed in m/s of sound propagating from a 440. Hz tuning fork vibrating in 250C air. The speed of sound as a function of temperature use the following equation: V = 331 m/s + (0.6) T(0C)

346

A student weighing 700 N climbs a flight of stairs 5.0 m high in 10 s, what power was required in watts?

350

A student weighing 700 N climbs a flight of stairs 5.0 m high. Calculate the work done in joules.

3500

In Data Table 2, Current versus Resistance with a constant voltage of 2.0 volts, when the resistance is set at around 500 ohms, the current is around___________ mA

4.0

A transformer with 800 turns on the primary coil is used to decrease the voltage from 2000 volts to120 volts for home use.How many turns should be in the secondary coil?

48

In Data Table 2, Current versus Resistance with a constant voltage of 2.0 volts, when the resistance is set at around 400 ohms, the current is around___________ mA

5.0

A transformer with 800 turns on the primary coil is used to decrease the voltage from 2000 volts to120 volts for home use.If 3.0 Amps flows in the primary coil, how much current is there inthe secondary coil?

50

A 2.0 kg block rests on top of a horizontal, frictionless surface. A horizontal unbalanced force gives the block an acceleration of 3.0 m/s2. What is the magnitude of the force?

6 N

An object with a mass of 2.0 kg is dropped. It takes 6.0 s to hit the ground. Then an object with a mass of 4.0 kg is dropped from the same point. How long does it take to hit the ground?

6.0 s

At 1.00 Hz frequency, Measure the velocity of the wave. Note: the "v = f *wavelength" or v = f / T = _____________ cm/s (approximately)

6.5

An object has 5.0´108 (500,000,000) electrons more than protons. What is the net charge of the object in coulombs? (The charge of one electron is 1.6×10^-19 C, the mass of one electron is 9.1×10^-31kg) MATH

8.0 x 10^-11

When the number of protons in a nucleus exceeds ______________, the nucleus isunstable.

83

In Data Table 1, Voltage versus Current With a constant Resistance of 1.00 kilo ohms, when voltage is set at 9.0 volts, the current is around___________ mA

9.0

The density of the liquid in the bathtub shown in the figure included in this question which interior is 1.50 m long, 0.70 m wide, and that is filled to a height of 0.50 m is ____________ kg/m3. The mass of the liquid was measured to be 5000kg.

9434

Which letter (A, B, C, or D) in the diagram on page 4 of the lab procedure represents the wavelength? (Refer back to the definition of wavelength in lesson#11).

A

Explain your answer to the previous question

Astronauts are moving fast enough "sideways" around the earth so that, as they fall, they curve away from hitting the earth. Meaning, they fall continuously in a "controlled orbit."

What happens when you expose an air-inflated balloon, which contains some amount of water, to flame? Explain the rational.

Balloon will NOT pop because the water has high specific heat capacity so it will absorb the heat, which should prevent the rubber from melting.

Before you watch the video link below, predict what happens when you expose an air-inflated balloon to flame? Explain the rationale behind your answer.

Balloon will pop because the flame will melt the rubber causing the air to flow out of the balloon.

What do you observe when you expose an air-inflated balloon to flame? Explain the rational.

Balloon will pop because the flame will melt the rubber causing the air to flow out of the balloon.

What is the other isotope of Boron that exist in nature (meaning its % abundance is not zero)? and what is its % abundance?

Boron-10, its abundance is around 20%

Which is the most abundant and which is the least abundant among the Carbon's isotopes?

Carbon-12 is the most abundant while Carbon 14 is the least abundant

After watching https://www.youtube.com/watch?v=Kcuz1JiMk9k , answer the following question: We are able to determine the age of fossils by _________________ (complete)

Comparing the quantities' ratio of decaying Carbon-14 to the stable Carbon-12

You are given an unknown resistor and asked to find its resistance value. You have a voltage source (battery), and ammeter (to measure the current). Explain in detail the experimental procedure and equations used to evaluate the resistance value.

Connect the circuit as displayed in the simulation, set the voltage at an arbitrary value, record the corresponding current. Divide the voltage by the current to obtain the resistance.

How are work and energy related? (Read the procedure section carefully).

Energy is the ability to do work, and work is the mean by which energy changes from one form to another.

"The force of Gravity can be blocked by certain mediums". To test it, place a 1 inch thick book between the magnet and the earth, and drop the magnet does it fall slower than before?

False, because the magnet fell toward the earth at the same rate as before.

When the magnet is held a bit further (about 10 centimeters or 4 inches) away from the fridge, the magnetic force between the magnet and fridge is stronger than the gravitational force between the magnet and the Earth.

False, because the magnet fell toward the earth which indicates that gravity overcame magnetism.

Which of the following electromagnetic waves has the greatest frequency?

Gamma-rays

After the polarity of the magnet is switched. How does the red compass needle change its direction while you move it around the magnet?

It changes its direction so that it is always pointing away from the magnet's north pole and towards the magnet's south pole.

How does the red compass needle change its direction?

It changes its direction so that it is always pointing away from the magnet's north pole and towards the magnet's south pole.

Can you now draw a conclusion about what the silver compass' needle represent? Why?

It represents the south pole of the compass' magnet because it is attracted by the north pole of the bar magnet and repelled by the south pole of the bar magnet

From the specific heat table above, the element with the best thermal conductivity is _______________

Lead (Pb)

Based on the results of this experiment, what are the parameter(s) that determine the pendulum's period?

Length

Light can travel to Earth from a distant star, but sound cannot. Why is this?

Light can travel in vacuum, while sound cannot.

In wave#2 (slinky/sound like), What do we call this type of waves?

Longitudinal

Who discovered radium?

Marie and Pierre Curie

What type of documents upload are accepted in this course

Microsoft Word, pdf, and Microsoft Excel only

Would the force of gravity by 1 kilogram of rocks on you be different from force of gravity by 1 kilogram of feather? Explain

No, as long as their centers are at the same distance away from you, because force of gravity depends on mass and distance (not density)

Would the force of gravity by 1 kilogram of steam (water vapor) on you be different from force of gravity by 1 kilogram of ice (solid water)? Does the density affect the force of gravity? Explain

No, as long as their centers are at the same distance away from you, because force of gravity depends on mass and distance (not the phase of the matter)

Did the change in the amplitude from 0.5 cm to 1.00 cm, while keeping the frequency at 1.00 Hz, alter the period?

No, because the period value did not change

Did the change in the frequency from 1.00 Hz to 2.00 Hz, while keeping the amplitude at 1.00 am, alter the speed of the wave?

No, because the speed of the wave value did not change

Did the change in the amplitude from 0.5 cm to 1.00 cm, while keeping the frequency at 1.00 Hz, alter the wavelength?

No, because the wavelength value did not change

Based upon the experimental results of Data Table 4-3 of Period versus angle on earth, does the experimental period depend upon the angle? Explain using the data you collected.

No, the period is independent upon the angle because the period did not change (or changed within 0.01 second) when we changed the angle

Based upon the experimental results of Data Table 4-2 of Period T versus mass m on earth, does the experimental period depend upon the mass? Explain using the data you collected.

No, the period is independent upon the mass because the period did not change (or changed within 0.01 second) when we changed the mass

How do you think each material's specific heat value affect its ability to store heat?

The higher the material's specific heat value, the higher its ability to store heat

When eating a pizza or a hot pie, the crust may be only warm, but you may burn your mouth when eating the topping or filling. Why ? (Explain this behavior in terms of the specific heat concept)

The higher the specific heat, the less temperature changes with time. Since cheese and topping have higher specific heat than the crust they change their temperature slower than the crust which has a lower specific heat.

Explain how transformers operate?

The input AC voltage generates an alternating current is in the primary coil. Consequently, a magnetic field will be induced in the primary coil because of the change in the magnetic field. Since the current is alternating, the magnetic field induced will be alternating too. This alternating magnetic field will induce an output voltage in the secondary coil. The output voltage will depend on the number of turns ratio.

What did happen to the intensity (amplitude) of the wave when the proximity from the source increased (when the wave moved further away from the source)?

The intensity (amplitude) decreased

What did happen to the intensity (amplitude) of the wave when you increase the vertical displacement (shifting the plier further up and down)?

The intensity (amplitude) increased

When using AC voltage source as opposed to DC, what will happen to the magnitude and polarity of the magnetic field? Why?

The magnitude and direction of the magnetic field alternate because the magnitude and direction of the electric current alternate.

How did the magnitude of B change when you doubled the distance between the electromagnet and the field meter?

The magnitude of B decreased to almost one-fourth of its initial value

How did the magnitude of B change when you doubled the distance between the magnet and the field meter?

The magnitude of B decreased to one-fourth of its initial value

How would you characterize the relationship between the number of loops and the strength of the magnetic field?

The magnitude of B is directly proportional to the electromagnet's number of loops.

If two materials have two different specific heat values, which material's temperature is more sensitive to heat exchange when they are exposed to the same amount of heat, the higher or the lower specific heat material?

The temperature of the material with lower specific heat value is more sensitive to heat exchange

When the magnet is held very close (a few millimeters or fraction of an inch) away from the refrigerator, where the magnet is not quite in contact with the fridge, the magnetic force between the magnet and fridge is stronger than the gravitational force between the magnet and the Earth.

True, because the magnet moved toward the fridge and did not fall toward the earth.

While in contact with the refrigerator, the magnetic force between the magnet and the fridge is stronger than the gravitational force between the magnet and Earth.

True, because the magnet stayed attached to the fridge and did not fall toward the earth

In a battery circuit with different resistors in parallel, the ______________

Voltage is the same across each resistor., while current is different through each resistor, based on its resistance value. .

(This is the first question in the procedure document) Go to: https://phet.colorado.edu/en/simulation/circuit-construction-kit-dcDrag wires, batteries, and bulbs into the box. Explore around for a few minutes (I suggest around 15 minutes). Try to build a circuit (You built a circuit if the light bulb gets turned on). Move parts around to make your circuit work. If you start a fire, make a different circuit! Note that the blue moving dots represent the electrons (note their speed). Share the new things you learned about electric circuits from this activity (around two paragraphs).

While exploring the Phet Circuit Construction lab I discovered some very interesting things. In order to build the most basic circuit I needed to include a battery (power source), a wire to conduct the electricity, and a lightbulb. A switch isn't necessary for a basic circuit but without it it will continue to drain the battery until the battery is removed. Another thing I can do in the lab is add a resistor, which can control the dimness of the light. I also noticed that I can put conductors in between the wires and still have the circuit work, an example of a conductor I discovered was a coin, a paper clip, and most surprisingly a pencil. There are certain things that cannot conduct electricity, and therefore make the circuit nonfunctional. Things that cannot conduct electricity include a dog, a human hand, an eraser, and a dollar bill.Another thing that I observed in the simulation was that even without a lightbulb, if I build a proper circuit with a battery, the electrons still move throughout the circuit. I figured out that you can create a fire in the circuit when you connect a conductor across the circuit and the electrons move very fast.

The equations used to solve the previous question were:

Work= Force times distance, Power = Work divided by time

Could the horsepower developed by a slower-moving student ever be greater than that of a faster-moving student? Think about it then explain your answer

Yes, under certain condition.

What happens to the atomic number (Z) and the mass number (A) when a nucleus emits a beta particle (electron)?

Z increases by 1; A is unchanged.

What happens to the atomic number (Z) and the mass number (A) when a nucleus emits a gamma ray?

Z is unchanged; A is unchanged

A possible units of specific heat can be _______________ MATH

[The equation verbally]: (kilowatt times hour) divided by (kilogram times degree Celcius) kWh/over divided by kgC

Heat flows spontaneously from an object having a _______________

__high_____temperature to one having a ____lower_____ temperature.

Which of the following would be different for a person on the Moon rather than on Earth?

acceleration due to gravity

"If an object moves with constant velocity, then _____________ ."

all of these are true.

Electromagnetic waves have _____________ vector(s)

all of these.

The acceleration produced by an unbalanced force acting on an object is _______

all the choices are correct

Work requires ______________

all the choices are correct

All of the following may be represented by vectors except _______________

b. speed.

If the resistance of a resistor is tripled, the current will ___________ , when the voltage is set constant

be cut to one-third of its initial value

If the voltage across a resistor is doubled, the current will ___________

be doubled.

In a battery circuit with resistors in series, the ________________

current through each resistor is the same, but voltage across each resistor is different based on its resistance value

The electric power dissipated by a resistance R is ___________

directly proportional to I^2.

A balloon that sticks to walls is charged because of __________

friction

Which of these types of radiation has the greatest ability to penetrate matter?

gamma rays

Heat ______________________

has the same units as energy

Neutrons are good "projectiles" for inducing nuclear reactions because they__________

have no electric charge

Based on the results of this experiment, frequency and period are______

inversely proportional

Based on the results of this experiment, frequency and wavelength are ____________

inversely proportional

A generator converts ___________________

mechanical energy into electrical energy.

Ben franklin visualized positive and negatice charges as ___________ (this depiction was changed with our modern understanding of elecricity)

negative as lack of electricity, while positive is excess of electricity

The fission of 235U nuclei is initiated by _____________

neutrons

Which of these oxygen's isotopes were shaking (radioactive, hence unstable)? Select all the correct answers

oxygen-15 oxygen 19

Which of these oxygen's isotopes exist in nature (Their % abundance is not zero)? Select all the correct answers

oxygen-16 oxygen-17 oxygen-18

The electric connection that contains one junction or more is called ____________ connection

parallel

Explain why there is a difference between the horsepower (and power) developed in walking the stairs compared to that developed when running up the stairs.

power is work divided by time, and the work is the same but the time is less when you are running than walking.

An echo is a good example of the ______________

reflection of sound waves.

To convertgram to milligram, you have to move the decimal point to the

right three places

The minimum amount of fissionable material necessary to sustain a chain reaction is called _______

the critical mass

An object moving in a circle at a constant speed is accelerating because__________

the direction of the velocity is changing.

Based on your collected data in the "field strength vs loops number" table, how does the field strength' magnitude change when you increase the electromagnet's number of loops?

the field's strength increases

How does the field's strength change as you move the Field meter closer to the magnet?

the field's strength increases

How does the field's strength change as you move the field meter closer to the electromagnet?

the field's strength increases

Two masses, m1 and m2 are separated by a distance R. How does the gravitational force between the masses change, if the size of each mass and distance between them are exactly doubled?

the force remains the same

Compare the total current of a circuit (the current that comes out of the voltage source) between series and parallel connections, for the same set of resistors:

the total current in a parallel circuit is more than the series one

A characteristic associated with kinetic energy, rather than with potential energy, is______

velocity

"30 m/s at 50 degrees north east? is a measure of_______"

velocity.

When work is done on an electric charge, a ______________ is produced.

voltage

From the specific heat table, which material has higher specific heat, water or olive oil?

water has more than twice the specific heat of olive oil

Which is not an electromagnetic wave?

water wave

Support your answer to the previous question with the data in table 1

when we double one variable, the other was doubled. When we tripled one variable, the other was tripled and so on.

Explain your answer in the previous questions

work is weight multiplied by distance, and the distance and the weight are the same whether you are running or walking.

Did the change in the frequency from 1.00 Hz to 2.00 Hz, while keeping the amplitude at 1.00 am, alter the period?

yes, because the period value changed

Did the change in the frequency from 1.00 Hz to 2.00 Hz, while keeping the amplitude at 1.00 cm, alter the wavelength?

yes, because the wavelength value changed

Based upon the experimental results of Data Table 4-1 of Period T versus length L on earth, does the experimental period depend upon the length? Explain using the data you collected.

yes, the period depends on the length because the period changed when we changed the length

Is it possible to have negative velocity but positive acceleration? If so, what would this mean? (Hint: Check the sixth condition in the table above).

yes, this means the object is moving towards the left while decelerating.

Can the acceleration be negative, yet the object is accelerating (speeding up)? If so, what does this mean? (Check the fifth condition in the table)

yes, this means the velocity and the acceleration vectors are directed toward the left.

After completing graph of current vs resistance, does the graph support the relationship you inferred in the previous question? Explain

yes, we got a hyperbola, which indicates the two variables are inversely proportional

Does the graph support the relationship you inferred in the previous question? Explain

yes, we got straight line with an intercept of zero, which indicates the two variables are directly proportional.

For an electric device, current is __________

inversely proportional to resistance.

Based in the above calculations, the heat lost by Cd would be:

1025.7 Joules

In Data Table 2, Current versus Resistance with a constant voltage of 2.0 volts, when the resistance is set at around 600 ohms, the current is around___________ mA

3.3

With the frequency at the default (1.00 Hz ), wavelength "" = ___cm (approximately)

6.5

Before you watch the video link, predict what happens when you expose an air-inflated balloon, partially filled with water in it, to flame? Explain the rationale behind your answer.

Balloon will NOT pop because the water has high specific heat capacity so it will absorb the heat, which should prevent the rubber from melting.

Setting the position at 0.0 m, Initial Velocity at + 1.5 m/s, and the acceleration at - 0.10 m/s2. Describe the motion of the moving man in the simulation properly.

He is moving towards the right of the screen; his speed is decreasing gradually until he hits the wall.

Setting the position at - 10.0 m, Initial Velocity at + 5.0 m/s, and the acceleration at + 0.5 m/s2. Describe the motion of the moving man in the simulation properly.

He is moving towards the right of the screen; his speed is increasing gradually until he hits the wall.

Setting the position at - 9.0 m, Initial Velocity at + 2.5 m/s, and the acceleration at 0.0 m/s2. Describe the motion of the moving man in the simulation properly.

He is moving with constant speed towards the right of the screen. He will maintain his speed until he hits the wall.

The rationale to your answer in the previous question is:

Heat transfers from the high temperature object to the lower temperature object until they reach thermal equilibrium.

Question#4: Why do you think Block #1 floats and Block #2 sinks?

I believe that block #1 floats because its density is less than the density of the liquid it is in. I believe that block #2 sinks because its density is more than that of the liquid it is in.

Can you now draw a conclusion about what the red compass' needle represent? Why?

It represents the north pole of the compass' magnet because it is attracted by the south pole of the bar magnet and repelled by the north pole of the bar magnet

What does the left side of the electromagnet represent? How do you know?

It represents the south pole of the electromagnet because it is attracting the north pole of the compass while repelling the south pole of the compass.

The unit of work in the SI is the__________

Joule

The temperature scale with no negative values is _________

Kelvin

The quantity1/2mv^2is known as __________

Kinetic energy

What is the difference between a longitudinal wave and a transverse wave? Give an example of each.

Longitudinal wave : The direction of the wave (velocity) is parallel to the direction of the medium particles. Example: when you stretch a spiral string and release it. It will vibrate back and forth, so a wave is created moving up and down, and the medium particles (the spiral string) will be moving up and down too. Another example is the sound waves. Transverse wave: The direction of the wave (velocity) is perpendicular to the direction of the medium particles. Example is a string cord attached to the wall from one end, while you are moving the other end up and down. A wave will be created moving horizontally, while the medium particles (the string) will be moving up and down (vertically). Another example of transverse waves is the Electromagnetic waves.

Based on the previous answer, Does the period "T" depend on the amplitude?

No, because the period value did not change

Based on the previous answer, does the wavelength depend on the amplitude?

No, because the wavelength value did not change

In wave#2 (slinky/sound like), Does the medium (dots) move parallel or perpendicular to the wave?

Parallel

If you double both charges and double the distance between the two charges, the force of electricity will _____________

Stay the same

Different Waves _________________

all of these

Another way of describing the acceleration of an object by Newton's second law is _____

force per unit mass

Starting at a position of 0 m, if the man is moving at a constant velocity of +2 m/s, it will take him ____________ seconds to reach a position of 12 m.

6 s, we divide the distance by the velocity, which is 12 m divided by 2 m/s

Round the following number to three figures, and express them in standard powers-of-10 notation : 6487.33

6.49´10^3

A possible unit of acceleration is ___________

(yard divided by second divided by second)

Derived Quantity is

1. derived from calculation that involved several fundamental quantities 2.requires more than one measurement

One kilometer is the same as

1000 m

One mega newtons contains how many newtons

10^6

Look at the figure included in this question ...The racing car has travelled 10 meters in the first second, 30 m in the next two seconds, then 40 m in the last four seconds.What is the average speed in m/s?

11.4

Use your calculator to evaluate the following: 9.77000 x 10^6 X 1.76030 x 10^-3 MATH

17198

How many feet in 7.00 yards. Given: 1 yard = 3 feet

21.0

Given the Conversion statement:1 inch = 2.54 cm10.0 inches is equivalent to __________________________ cm

25.4

A car traveling at 70. m/s on a straight road is braked uniformly to a stop in 20 seconds. What is the car's acceleration in m/s2 ?

3.5 deceleration

The volume (in cm3) of 0.55 kilogram piece of iron (Density = 7.9 g/cm3) is

70.

Question 3 Question 3 (Referring to the block#2): What could it be made of? What do you think will happen if you make a smaller block out of the same material? Will it float or sink?

Block #2 could be made out of brick or aluminum. If you make block #2 smaller it will still sink.

(Refers to making the block bigger and smaller while keeping the material of the block the same). Does the Density change? Explain why this makes sense

Density remains the same because the mass and volume change proportionally, keeping their ratio constant

If the equation of a straight line graph is: Distance = 5.0 m/s time + 8.5 m, we can conclude that

Distance is the y-axis, time is the x-axis, slope is 5.0 m/s and y-intercept is 8.5 m

Setting the position at 0.0 m, Initial Velocity at - 4.0 m/s, and the acceleration at + 0.50 m/s2. Describe the motion of the moving man in the simulation properly.

He is moving towards the left of the screen; his speed is decreasing gradually until he hits the wall.

Setting the position at 0.0 m, Initial Velocity at - 2.0 m/s, and the acceleration at - 1.50 m/s2. Describe the motion of the moving man in the simulation properly.

He is moving towards the left of the screen; his speed is increasing gradually until he hits the wall.

Setting the position at + 8.0 m, Initial Velocity at 0.0 m/s, and the acceleration at - 1.0 m/s2. Describe the motion of the moving man in the simulation properly.

He starts from rest. He is accelerating towards the left of the screen.

Question (13) (Refers to changes after you check the "my block" box). While you try to mimic the sinking/floating behaviors of A, then B, then C. Which slider did you need to change? Could A, B, and C be made out of the same material? Why or why not? Which object (A, B, or C) must have the most mass? Which has the second most mass? Which has the least amount of mass?

I must change the mass' slider while keeping the volume the same. Since they all share the same volume, block B has the most mass while A has the least mass. They cannot have the same material because they have different densities as evidenced by the different sinking/floating behavior.

Question (10) (Refers to changes after you check the "my block" box). What properties of the block can you change? What makes a block more likely to sink or float? How does this change the block's density?

Mass and volume can be changed independently. This would necessarily imply change in the material type and hence the density. A block would sink faster when it has bigger mass and less volume.

(Questions 17-21 refers to the blocks displayed after you check the "Mystery" box). Refer back to the tables at the end of the lab procedure document. Object B has a mass of ________, Density of _________ , it is made of ___________and it _________ in water

Mass of 0.64 kg, Density of 0.64 g/L, it is made of apple and it floats in water

(Questions 17-21 refers to the blocks displayed after you check the "Mystery" box). Refer back to the tables at the end of the lab procedure document. Object D has a mass of ________, Density of _________ , it is made of ___________and it _________ in water

Mass of 3.10 kg, Density of 0.92 g/L, it is made of ice and it floats in water

(Questions 17-21 refers to the blocks displayed after you check the "Mystery" box). Refer back to the tables at the end of the lab procedure document. Object E has a mass of ________, Density of _________ , it is made of ___________and it _________ in water

Mass of 3.53 kg, Density of 3.53 g/L, it is made of diamond and it sinks in water

(Refers to making the block bigger and smaller while keeping the material of the block the same). Does the floating and sinking behavior change?

No, because floating and sinking behavior depends only on the density, which is dependent on the material

Question (14) (Refers to changes after you check the "same volume" box). All these blocks are the same ______________. Besides being different colors, the blocks also have different ____________________.

Same volume and different masses

Question (16) Match the sinking/floating behavior with the density scale in the procedure part.

Sinks quickly 1.5-3.5 kg/L, Barely sinks 1.05 - 1.40 kg/L, Barely floats 0.70 - 1.00 kg/L, Floats well 0.10 - 0.60 kg/L

Name the dependent and independent variables in the graph

The dependent variable is the circumference. The independent variable is the diameter

Question (15) (Refers to changes after you check the "same mass" box). All the blocks have a mass of _________ kg. They are different in colors and different in ______________. Observe how they float. What do you notice? If all the blocks have the same mass, why do you think some are floating and some sinking?

The mass of all the blocks is 5.00 kg, they differ in the volume. The block with the least volume sinks the fastest while the biggest volume floats the most. They differ in their sinking/floating behavior because of the difference in the density, which is dependent on the mass to volume ratio.

What must be included in the title used on a graph? (The answer is under figure 1.1 in Discussion section)

The title of the y-axis versus the title of the x-axis, and a reference to what the graph represents.

When the acceleration is zero, what can you say about the velocity of an object?

The velocity is constant, meaning the speed and the direction are constants

Question (11) Refers to changes after you check the "my block" box. As you try to create a block with the highest density What is your block's volume? What is your block's mass? Do you think your highest density block will sink or float?

The volume is 1.00 L while the mass is 10.00 kg. This block will sink.

Question (12) (Refers to changes after you check the "my block" box). As you try to create a block with the Lowest density What is your block's volume? What is your block's mass? Do you think your block will sink or float?

The volume is 10.00 L while the mass is 1.00 kg. This block will float.

Setting the position at 0.0 m, Initial Velocity at + 4.5 m/s, and the acceleration at - 1.0 m/s2. Predict the shape of the curve of the "position vs time" graph for the motion of a man based on the conditions stated.

These conditions will yield a decreasing slope throughout the curve, it will yield a curve concaved down. This represents graph "c" in Figure 2 in the procedure document.

Setting the position at 10.0 m, Initial Velocity at - 4.0 m/s, and the acceleration at 0.0 m/s2. Predict the shape of the curve of the "position vs time" graph for the motion of a man based on the conditions stated.

These conditions will yield a straight-line graph with a constant negative slope throughout the graph. This represents graph "d" in Figure 2 in the procedure document.

Setting the position at 0.0 m, Initial Velocity at + 2.0 m/s, and the acceleration at 0.0 m/s2. Predict the shape of the curve of the "position vs time" graph for the motion of a man based on the conditions stated.

These conditions will yield a straight-line graph with a positive slope. This represents graph b in Figure 2 in the procedure document.

Setting the position at 0.0 m, Initial Velocity at 0.0 m/s, and the acceleration at + 5.0 m/s2. Predict the shape of the curve of the "position vs time" graph for the motion of a man based on the conditions stated.

These conditions will yield increasing slope throughout the curve, it will yield a curve concaved up (parabola). This represents graph "a" in Figure 2 in the procedure document.

How are the units of the slope of a graph determined? Note that the question asks about the unit of the slop NOT the equation of the slope. (The answer is in the Discussion section, under notes over figure 1.1)

Unit of the y-axis divided by the unit of the x-axis

What is the recommended way to contact the instructor?

Via email at [email protected]

Which of the following definitions is consistent with the term model in science?

a description that is used to help visualize something that cannot be directly observed.

Theory attempts to

explain what happens

We have established that a parabola represents acceleration. Which one of the two parabolas below (A) or (B) represent bigger acceleration? Why? (This question reference the last question in the procedure document).

graph B has bigger acceleration because the slope, which represents the velocity, is increasing at faster rate.

Newton's first law refers specifically to ________________

masses at rest or in motion

Question (6) what do you think the label "Volume" mean? and what do you think the label "Mass" mean?

mass is amount of matter the object has, while volume is the amount of space the object occupies.

"As a block slides down a 30 degreesfrictionless incline, its acceleration (not velocity) _________"

remains constant.

"If the velocity of a body increases, we may be sure that, during the time of this increase,___"

the body is accelerated.

"When an object accelerates, there is necessarily a change in ___________ ."

velocity.