Physics Final Review

For the circuit below use the chart method we have been discussing within video lessons to find "V1" and "V2" (voltage 1 and voltage 2)? R1= 3 R2= 6 V=6 (parallel circuit)

6 V

In the circuit diagram provided below, what is the total voltage "Vt"? Type your value below. R1= 10 R2= ? R3= 5 V= 9 A= 0.2 (series circuit)

9

n order to produce a wave, there must be _______________.

a vibration

If an object appears "black", this is because all of the wavelengths of light are ______________.

absorbed

Volume or loudness of sound is associated with _________________. The louder the sound, the more energy the sound wave has.

amplitude

For those individuals who require assistive devices such as glasses/contacts, blurry vision is caused when the refracted rays entering your eyes ________________________.

are not focused on your retina

You are given a 3 meter long wire, a nail, and a battery to produce your own electromagnet. Only using these materials, what should you do to make the STRONGEST electromagnet?

il the wire tightly to add as many coils onto the nail as possible.

Which of the following would serve as the BEST "core" for an electromagnet?

iron nail

Fusion occurs when two lighter nuclei ___________ to form one ___________ nucleus.

join together, heavier

Fission occurs when a __________________ nucleus splits into two _____________ nuclei.

larger/more massive, smaller/less massive

Sound waves are what types of waves?

longitudinal waves Correct

If you mix red with blue light, what color light is formed?

magenta

In both fusion and fission reactions, the products are _____________ than the starting materials which drives the reaction.

more stable

In order to experience the Doppler effect, you must have relative _____________________ between the source of the wave and the observer.

motion

Compared to the speed of sound in air, the speed of light is ________________________.

much faster

It is possible for us to transmute LEAD to GOLD, but we don't because the process to do so is ____________________ compared to the amount of gold we would be able to produce.

much more expensive

If you place a compass next to a current carrying wire, the needle on the compass turns. The compass needle turns because _______________.

the current carrying wire produces magnetic field around the wire

Beta particles can be stopped by _________________. (select two correct answers)

top layer of skin aluminum foil

Is light a transverse or a longitudinal wave?

transverse

The image formed on your retina (back of your eyeball) is ______________ and your brain must take this image to make sense of what we see.

upside down/ inverted

The image formed inside a mirror is what type of an image?

virtual image

If you mix green with red light, what color light is formed?

yellow

Nuclear reactions are different than some of the other chemical reactions you may have learned in chemistry as these reactions involve much more energy that tend to come from the involvement of what TWO different parts of an atom?

Protons, neutrons

If you were to wire two identical light bulbs with two identical batteries and wires in series vs. parallel, would there be a difference in the brightness of the light bulbs? If so, which would provide brighter shining light bulbs? (Circuits provided below are NOT drawn to reflect the scenario provided in the problem but simply displaying series vs. parallel circuits).

Series circuit.

True or false: Current is induced (made) only when there is relative motion between the magnet and the coil of wire.

True

True or false: The speed at which you move the magnet relative to the coil of wire impacts how much current is produced in the wire.

True

Which color in the visible light spectrum has the highest frequency and energy?

Violet

A wave has frequency of 50 Hz and a wavelength of 10 m. What is the speed of the wave?

500 m/s

Radioactive decay is when a nucleus decomposes by releasing protons and/or neutrons to achieve ____________.

stability

For the circuit below use the chart method we have been discussing within video lessons to calculate the value of "R2"? R1= 10 R2= ? R3= 5 V= 9 A= 0.2 (series circuit)

30 ohms

In the circuit diagram provided below, what is the current through all 3 resistors "I1, I2, I3, It"? Type your value below. R1= 10 R2= ? R3= 5 V=9 A=0.2 (series circuit)

0.2A

If you see the flash of lightening and hear thunder 5 seconds later, how far away was the lightening in miles?

1 mile away

Two charged objects have a repulsive force of 8 N. If the distance separating the objects is halved (½), then what is the new force?

32 N

For the circuit below use the chart method we have been discussing within video lessons to calculate the value of "Pt" (total Power)? R1= 10 R2= ? R3= 5 V= 9 A= 0.2 (series circuit)

1.8 W

wo identical small charged spheres are a certain distance apart, and each initially experiences an electrostatic force of magnitude F due to each other. With time, charge gradually diminishes on both spheres. What is the magnitude of the electrostatic force when each of the sphere has lost half of its initial charge?

1/4 F

A sound wave has wavelength of 10 m and a speed of 343 m/s. What is the frequency of the wave?

34.3 hz

Google this answer...What is the "standard" speed of sound in air?

343 m/s

For the circuit below use the chart method we have been discussing within video lessons to calculate "Rt" (total resistance) R1= 3 R2= 6 V= 6 (parallel circuit)

2 ohms

Using the information provided in the circuit below, calculate the overall resistance within the circuit. (Don't forget to use the information provided in the voltmeter and ammeter.) 16 V, 0.90 A

20 ohms

For the circuit below use the chart method we have been discussing within video lessons to calculate "It" (total current)? R1= 3 R2= 6 V= 6 (parallel circuit)

3 A

How many seconds does it take for sound to travel in 1 mile?

5 seconds

The following model was presented to aid students in comparing and contrasting the Gravitational and Electrostatic Forces. The teacher told the students that there was missing information from the model and asked them to revise the model to make it more correct. What should the students add to the model and why?

Add short arrows of equal length to the gravitational force model and long arrows of equal length to the electrostatic model to show the relative strength of each force. Arrows for gravitational force should point toward one another because the force attracts. Arrows for electrostatic force should be drawn toward each other for oppositely charged objects and away from each other for like charged objects because objects with the same charge will repel one another.

What are the three general types of radioactive decays? (select all THREE)

Alpha Gamma Beta

Based on the table displaying "Speeds of Sound", through which type of "material" does sound travel the fastest?

Aluminum (highest density)

Two charged objects are held 1 meter apart from each other. Then they are moved to 2 meters apart. How is the electrostatic force and gravity force between them affected by this move?

Both forces will be ¼ as strong after the move.

Cyan, yellow, and magenta are know as ____________ colors because they each consist of two primary colors mixed together. (Check 2 correct answers)

Complementary, Secondary.

For those suffering from hyperopia/farsightedness (cannot see close up objects clearly), _____________ lenses are used to move the focused rays forward onto the retina.

Convex

What type of mirror is used as rear view mirrors of cars?

Convex

The brightness of light bulbs have to do with which of the following?

Current

What is induced (produced) when a magnet is passed back and forth through a coil of wire?

Current

T of F: Doppler effect is produced because the source (what is producing the sound) is changing it's pitch as it moves.

False

Which of the following is NOT a characteristic of Fg within the Universal Gravitation Law?

Fg can be an attractive or a repulsive force

Complementary color magenta with what PRIMARY color of light will give white light?

Green

Which of the following interaction between two charges will lead to an ATTRACTIVE Feel?

One oppositive (+) and one negative (-)

The low pitch (low notes) are associate with ______________ frequency (f).

Low

What are the three primary colors of pigment (paint)? These are the colors of ink many of you have in your color ink jet printers.

Magenta, Cyan, and Yellow.

If you cross a vertical (up and down) polarizing lens with a horizontal (left and right) polarizing lens, what happens to the light through both lenses?

No light penetrates through both lenses.

____________________ and _________________ are two examples of how human beings use fission reactions because of our ability to better initiate and control such reactions. (choose two)

Nuclear power plants, and bombs

Which type of electromagnetic wave produces the LONGEST wavelength and lowest frequency?

Radio waves

We have three different color cones in our eyes (retina) that perceive color. On the average, what 3 color cones do we have in our eyes? (Check all that applies)

Red Green Blue

Three primary colors of pigment include: yellow, cyan, and magenta. What are the three primary colors of light (if you can't find the answer in the video look this up on Google) ? (Check all that applies)

Red, Green, and Blue

What kind of an image is formed on a plane mirror? (2 correct answers)

Same size

Reflection is when waves bounce off different objects. An example of sound waves being "reflected" is known as an echo. Which of the following is an example of reflection of light waves?

Seeing your own image inside a mirror.

Why is it important to use the type of mirror as discussed above?

The cars next to or behind you look much smaller than the actual size which helps you see what's going on around you

The Law of Universal Gravitation and Coulomb's Law for electrostatic forces are often compared because both of these forces are affected by certain quantities that describe objects (mass for gravity and for electrostatics) and the distance between those objects. While there are similarities, there are also important differences. Which answer most completely describes the difference/s between the gravitational force and the electrostatic force?

The gravitational lforce is weaker and can anly attract objects but the electrostatic force is strong and can both attract and repel.

A group of students are conducting an investigation about charging through the process of friction. The students rub two neutral materials together, and there is a transfer of electrical charge from one material to the other. What is the net electrical charge of the objects together?

The net electrical charge remains neutral as electrons are transferred from one material to the other.

During a lab, a plastic rod was rubbed with cotton and the ROD became positively (+) charged. Which of the following is the best explanation for why the rod becomes positively (+) charged?

The plastic rod lost electrons to the cotton during the charging process.

The strength of the magnetic field around electromagnet is NOT dependent which of the following?

The shape of the "core" of the electromagnet

What is half-life?

The time it takes for exactly half of a radioactive sample to decay.

If you mix, the three primary colors of light together, what color light do you perceive?

White

Two complementary colors of light (red and cyan) are mixed together to give what color light?

White

What are the three secondary colors of light? (These colors exist on the color wheel in the video.) (Check all that applies)

Yellow, Cyan, and Magenta.

For those suffering from myopia/nearsightedness (cannot see far away objects clearly), concave lenses are used to move the focused rays ______________ onto the retina.

further back

Temperature of the material makes a difference in the speed of sound. Compared to air temperature at 20C, air temperature at 40C will have _______________ speed of sound.

a faster

Gamma decay is somewhat different than alpha and beta as it does not emit particles but simply energy. Gamma radiation can be stopped by ________________ (make sure you watch the second video).

block of lead

X rays are important to medical experts as these waves have enough energy to penetrate through soft tissues, but not denser materials such as ________________.

bone

If a magnet is broken into two pieces,

both pieces will have a north and a south pole

One major advantage of electromagnets compared to "regular" permanent magnets is that electromagnets _______________________.

can be turned on or off

Alpha particles can be stopped by __________________. (select two correct answers)

cloth sheet of paper

When we discuss the Doppler effect with respect to LIGHT waves, we can use instruments to help notice/perceive the change in _______________ .

color

Which of the following types of mirror can produce both an upright and an inverted image?

concave

If you mix green with blue light, what color light is formed?

cyan

If the current running through the electromagnet _______________, the electromagnet becomes weaker.

decreases

One MAJOR difference between fusion and fission reactions is that fusion reactions produce MUCH greater amounts of ______________________.

energy

_____________________ is the type of reaction we use more readily in our society based on our ability to control and monitor it.

fission

The point at which you must stand BEYOND (further back) to see your image inverted on the type of mirror as mentioned above is called a _______________________.

focal point

Longitudinal waves have particles moving ________________ to the direction of the wave.

parallel

When we discuss the Doppler effect with respect to SOUND waves, we notice/perceive the change in ________________.

pitch

The cornea and the lens within your eyes ____________ light onto your retina to form an image.

refract

When you look at a straw in a glass of water, the straw appears bent because the ____________ light wavelengths make you think the straw is located in a different place than it actually is.

refracted

When sound and light waves pass across two boundaries between two substances, the waves change speed and cause a change in direction of the waves. This phenomenon is called ______________.

refraction

Fusion reactions continuously require "fuel" to run the reactions. This is why, nuclear scientists believe the our sun will one day _______________.

run out of "fuel" and burn out