Physics Review
Approximately how much power is expended if you lift a 50-N rock 10 meters in 5 seconds? a) 100 W b) 10 W c) 2 W d) 0 W
100 W
The key part of how a fuse works is? a) A bimetallic strip that bends when heated by electrical current passing through it b) A thin piece of metal that melts when too much current is passed through it c) Two ammeters that measures the amount of current flowing out and compares it to the amount of current flowing back from a circuit d) Why use a fuse, when you can use a penny?
A thin piece of metal that melts when too much current is passed through it
Armand Fizeau used a toothed wheel in his experiment to gain a terrestrial measurement of the speed of light a) True b) False
True
Current causes injury, not voltage. a) True b) False
True
Diverging lenses have negative focal lengths a) True b) False
True
Diverging mirrors have negative focal lengths a) True b) False
True
Energy can neither be created nor destroyed. When a loss occurs in one form of energy, and equal increase occurs in other forms a) True b) False
True
Lightning develops because a large negative charge is isolated at the bottom of a rain cloud which induces a positive charge on the ground below the cloud. a) True b) False
True
Mirages occur because of the refraction of light on a hot day a) True b) False
True
Pointed objects are less likely to get struck by lightning. a) True b) False
True
Projectors produce real, enlarged and inverted images a) True b) False
True
Simple harmonic motion is a special type of periodic motion which uses a restoring force to vibrate and object about an equilibrium position a) True b) False
True
The rate at which work is done is called power a) True b) False
True
The smallest charge an object may attain is + or - 1.60 x 10^-19C. a) True b) False
True
True of False: Moment of inertia (I) is a measure of an object's resistance to rotation a) True b) False
True
True of False: Most of the planets orbit the sun in nearly circular orbits (meaning their eccentricity is very low) a) True b) False
True
When an object is charged by induction, electrons flow from the ground onto the object or from the object onto the ground. a) True b) False
True
When looking in a plane mirror the image appears the same distance behind the mirror as the object is in front of it a) True b) False
True
If you lift one load up two stories how much work do you do compared to lifting one load up only one story? a) Four times as much b) Twice as much c) The same amount d) One half as much
Twice as much
Polarized light is used in which of the following a) 3D Projectors b) Sunglasses c) LCD screens d) all of the above
all of the above
Ohm's law states that voltage and current have what kind of relationship? a) linear b) quadratic c) inverse d) inverse square
linear
Intensity levels of sound waves are measured in decibels which is a ___ scale that compares an intensity level to the smallest audible noise. a) linear b) inverse c) logarithmic d) sinusoidal
logarithmic
Sound is an example of what type of wave? a) transverse b) longitudinal c) electromagnetic d) none of the above
longitudinal
The base unit of length in the SI system is the... a) meter b) gram c) liter d) second
meter
In the absence of air resistance, a ball of mass m is tossed upward to reacha height of 20 m. At the 10-m position, half way up, the net force on the ball is a) 2mg b) mg c) mg/2 d) mg/4
mg
Which of the following correctly gives units of measure from least to greatest: a) milligram, gigagram, megagram b) nanograms, kilograms, centigrams c) teraliters, milliliters, liters d) nanometers, millimeters, centimeters
nanometers, millimeters, centimeters
The time period in which a wave repeats is which of the following? a) frequency b) wavelength c) wave pulse d) period
period
When a rubber balloon is rubbed with fur, the balloon gains what kind of charge. a) positive b) negative c) neutral
negative
When white light passes through a prism, green light is bent more than a) blue light. b) violet light. c) red light. d) Two of these choices are correct. e) None of these choices are correct.
red light.
Echoes demonstrate __ of sound waves a) refraction b) reflection c) diffraction d) resonance
reflection
Chromatic aberration occurs because different colored light rays... a) focus at different places after reflection from a mirror b) refract at different angles when passing through a lens c) pass through different parts of a lens d) none of the above
refract at different angles when passing through a lens
When we neglect air resistance, the horizontal component of a projectile's velocity: a) is zero b) remains constant c) changes as time progresses
remains constant
Polarization is a property of a) transverse waves. b) longitudinal waves. c) all waves. d) none of these.
transverse waves
Light bends how many times when transmitted through a biconvex lens a) once b) twice c) three d) it doesn't bend
twice
Astronauts in an orbiting space shuttle experience a sensation of weightlessness because, a) the space shuttle is moving away from the earth b) the space shuttle is in free fall by matching the earth's curvature c) the space shuttle is not affected by the earth's gravity d) the mass of the space shuttle decreases as the distance from the earth increases
the space shuttle is in free fall by matching the earth's curvature
An index of refraction greater than 1.00 for a medium would imply that a) refraction is not possible b) the speed of light in the medium is equal to the speed of light in a vacuum c) the speed of light in the medium is less than the speed of light in a vacuum d) reflection is possible
the speed of light in the medium is less than the speed of light in a vacuum
In this course we will try to learn more about: a) really small things b) outer space c) the world around us d) confusing mathematics (don't choose this)
the world around us
The phenomenon of beats results from sound a) reflection. b) resonance. c) interference. d) All of these. e) None of these.
interference.
What is the proper definition of grounding a charged object? a) introducing a large positively charged body to the negatively charged body b) introducing a large neutral body to the charged object c) introducing a large negatively charged body to the positively charged body d) more than one of the above
introducing a large neutral body to the charged object
Consider a ball rolling down an inclined plane. The normal force on the ball (the force perpendicular to the plane). a) is mg. b) is greater than mg, always. c) may be grater or less than mg. d) is less than mg, always
is less than mg, always.
What is defined as "the source of diverging light rays" in a ray diagram? a) the image b) the object c) the center of curvature d) the focal point
the object
What are the primary pigments? a) yellow, cyan, magenta b) red, green, blue c) yellow, indigo, green d) violet, green, red
yellow, cyan, magenta
When a ball is thrown down witha velocity of 4 m/s, its initial velocity upon leaving your hand is: a) +4 m/s b) -4 m/s c) -9.80 m/s^2 d) +9.80 m/s^2
-4 m/s
An astronaut weights -156 lbs on earth, what does he weigh in Newton's if 1 lb = 4.45 N? a) -156 N b) -35.1 N c) -694 N d) -1529 N
-694 N
If the distance between two charges is tripled, the new force exerted on the charges... a) ...is 3 times the original force b) ...is 9 times the original force c) ...is 1/3 the original force d) ...is 1/9 the original force
...is 1/9 the original force
A negatively charged rod is brought near the top of an electroscope but does not touch it. The leaves separate because... a) ...the electroscope is charged negatively b) ...the electroscope has had its charges separated (it is polarized) c) ...the electroscope is charged positively d) none of the above
...the electroscope has had its charges separated (it is polarized)
If an electroscope is charged negatively and a positively charged rod is brought close to it... a) ...the leaves will separate further apart b) ...the leaves will come closer together c) ...the leaves will stay the same distance apart
...the leaves will come closer together
As the frequency of a wave increases in a given medium... a) ...the amplitude increases b) ...the wave speed decreases c) ...the wavelength decreases d) ...the loudness increases
...the wavelength dcreases
The speedometer in a car does not measure the car's velocity because velocity is a... a) ...vector quantity and has a direction associated with it b ...vector quantity and does not have a direction associated with it c) ...scalar quantity and has a direction associated with it d) ...scalar quantity and does not have a direction associated with it
...vector quantity and has a direction associated with it
Two hertz (2 Hz) is the frequency of a wave with what period? a) 0.5 s b) 0.5 m/s c) 2 s d) 2 m/s
0.5 s
How much energy does a 100.0 W light bulb use in 8.0 hours? a) 0.0080 kWh b) 0.80 kWh c) 13 kWh d) 8.0 x 10^2 kWh
0.80 kWh
Approximately how much work is done on a 50-N rock that you hold above the ground at 5m? a) 500J b) 50J c) 10J d) 0J
0J
What is 1A of current equal to? a) 1 W / 1s b) 1 kW x 1h c) 1 W x 1s d) 1 C / 1s
1 C / 1s
What is the same astronaut's mass (in kg)? a) 15.9 kg b) 3.58 kg c) 70.8 kg d) 156 kg
70.8 kg
A man sings middle C, which has a frequency of 262Hz, what is the wavelength of the sound wave he produces? a) 131m b) 65.5m c) 1.31m d) 0.764m
1.31m
The number 0.00001450m in scientific notation is: a) 1.45 x 10^5 m b) 1.450 x 10^-6 m c) 1.450 x 10^-5 m d) 1.45 x 10^-6 m
1.450 x 10^-5 m
If the eyepiece of a refracting telescope has a focal length of 2cm, and the objective lens of the telescope has a focal length of 36cm, what is the effective magnification of the telescope? a) 72x b) 36x c) 18x d) 2x
18x
Car J moves twice as fast as car K. The momentum of Car J, compared to Car K is... a) 4 to 1 b) 2 to 1 c) 1 to 2 d) the same
2 to 1
The average range of human hearing is roughly: a) 2Hz to 2,000Hz b) 20Hz to 20,000Hz c) 200Hz to 200,000Hz d) 2000Hz to 2,000,000Hz
20Hz to 20,000Hz
If a sound wave has a speed of 346 m/s, what is the temperature? a) 14.2oC b) 19.8oC c) 23.5oC d) 25.0oC
25.0oC
A force (F) acclerates a mass (m) with an acceleration (a). If the same net force is applied to another mass that is half the mass (m/2), then the acceleration of that mass will be: a) 4a b) 2a c) a/2 d) a/4
2a
Car J moves twice as fast as Car K. The kinetic energy of Car J, compared to Car K is... a) 4 to 1 b) 2 to 1 c) 1 to 2 d) the same
4 to 1
A child kicks a ball with an initial velocity of 8.5 m/s at an angle of 35 degrees with the horizontal. The ball has an initial vertical velocity of 4.9 m/s, what is the horizontal component of the ball's initial velocity? a) 3.6 m/s b) 4.9 m/s c) 7.0 m/s d) 13 m/s
7.0 m/s
Approximately how much work is done on a 50-N rock that you lift 10 m straight up? a) 500J b) 50J c) 10J d) 0J
500J
If two women join the man in the previous problem and sing the second and third harmonics, what frequencies are they singing? a) 524Hz and 1048Hz b) 524Hz and 786Hz c) 393Hz and 524Hz d) 393Hz and 786Hz
524Hz and 786Hz
Matthew pulls his little sister in a sled on an icy surface surface with a force of 60.0N at an angle of 37.0 degrees upward from the horizontal. If he pulls her a distance of 12.0m, what is the work done by Matthew. a) 185J b) 433J c) 575J d) 720J
575J
What is the average velocity of a car that travels 32 kilometers due west in 0.50 hours? a) 16 km/h b) 16 km/h, west c) 64 km/h d) 64 km/h, west
64 km/h, west
If a 25 kg block is on a hill with an incline of 15 degrees, what portion of the blocks weight is acting parallel to the incline? a) 245N b) 64N c) 237N
64N
What is the key component of a circuit breaker? a) A fuse b) A GFCI c) A capacitor d) A bi-metallic strip
A bi-metallic strip
All of the following are electrical safety devices, EXCEPT: a) A fuse b) A capacitor c) A circuit reaker d) A ground falut current interrupter
A capacitor
Who was teh first American to receive the Nobel Prize in Physics? a) Christian Huygens b) Willebrord Snell c) Albert Michelson d) Max Planck
Albert Michelson
Which of the following is true about geosynchronous orbiting satellites? a) All geosynchronous orbiting satellites must orbit at the same height above the earth's surface b) All geosynchronous orbiting satellites must orbit with the same orbital speed c) Each geosynchronous orbiting satellites stays over some set position on earth d) All of the above are true
All of the above are true
A boy and a girl are riding on a carousel, which is turning at a constant rate. The girl is near the outer edge, and the boy is closer to the center. Who has the grater period? a) The boy b) The girl c) Both have the same period d) Both have a period of zero
Both have the same period
The phenomenon of interference occurs for a) sound waves b) light waves c) Both of these d) Neither of these
Both of these
Of the following, what type of current and potential difference does a typical American household electrical outlet establish? a) Alternating Current (AC) with a 220V potential difference b) Direct Current (DC) with a 220V potential difference c) Alternating Current (AC) with a 120V potential difference d) Direct Current (DC) with a 120V potential difference
Alternating Current (AC) with a 120V potential difference
Earth satellites such as the International Space Station orbit at altitudes that are above the Earth's a) Atmosphere b) Gravitational field c) Both of these
Atmosphere
What type of force exists between a charge that is "positive" and one that is "negative"? a) Repulsion b) Attraction c) Tangential d) Communal
Attraction
Which of these changes when light refracts in passing from one medium to another? a) Speed. b) Wavelength. c) Both of these. d) Neither of these.
Both of these.
Who conceived of calling the two types of charges "positive and "negative"? a) J.J Thompson and Ernest Rutherford b) Benjamin Franklin c) Michael Faraday d) Robert Millikan
Benjamin Franklin
The net force of an object in circular motion is referred to as the: a) Centripetal force b) Centrifugal force c) Tangential force
Centripetal force
Which of the following is not a way to charge something? a) Charging by Quantization b) Charging by Friction c) Charging by Conduction d) Charging by Induction
Charging by Quantization
A spacecraft on its way from Earth to the Moon is pulled equally by Earth and Moon when it is a) Closer to the Earth's surface b) Closer to the Moon's surface c) Halfway from Earth to Moon d) At no point, since Earth always pulls more strongly
Closer to the Moon's surface
An instantaneous velocity is an object's speed and direction at some moment in time. a) True b) False
True
If a person has a prescription that is +2.0 diopters, what kind of lenses are these and what are the focal lengths of the lenses... a) Converging lenses with focal lengths of 2.0m b) Diverging lenses with focal lengths of 2.0m c) Converging lenses with focal lengths of 0.5m d) Diverging lenses with focal lengths of 0.5m
Converging lenses with focal lengths of 0.5m
The pitch of both a string and a pipe resonator increases as the length of the string or pipe: a) Increases b) Decreases c) Pitch does not depend on length
Decreases
Shadows have dark regions as well as grayish regions due to which of the following wave phenomena a) Diffraction b) Refraction c) Reflection
Diffraction
The unit kWh is often used to measure a) Current b) Voltage (Potential Difference) c) Power d) Energy
Energy
Which of the following is NOT a name for the physical quantity measured in volts: a) Potential Difference b) Energy c) Voltage d) EMF
Energy
A bug and the windshield of a fast moving car collide. The change in speed of the bug and change in speed of the car are the same size. a) True b) False
False
An instantaneous acceleration is when an object speeds up, really, really, really fast (you know...instantaneously). a) True b) False
False
Because the normal force acting on an object is often equal and opposite to the weight of an object--they are an example of an action-reaction pair. a) True b) False
False
Electrons and protons have the same charge and therefore attract each other a) True b) False
False
Electrons flow in the direction of conventional current a) True b) False
False
Scientific laws explain why patterns in nature exist. a) True b) False
False
The photo electric effect is a phenomenon in which light is behaving like a wave a) True b) false
False
The ration of output force to input force for a simple machine is called its efficiency a) True b) False
False
The reason why birds on a high voltage wire are not shocked is because they have insulated feet a) True b) False
False
The speed of a wave generally depends only on the source, no the medium. a) True b) False
False
Trees get struck by lightning because they are made of dry wood which is a good conductor. a) True b) False
False
True or False: An object cannot have a constant speed, and be accelerating? a) True b) False
False
Which of the following is not the name of one of the four fundamental forces? a) Electromagnetic force b) Frictional force c) Gravitational force d) Strong Nuclear force
Frictional Force (the other force is Weak Nuclear Force)
Which of the following is a safety device that is located in a wall outlet (usually in a bathroom)? a) Circuit Breaker b) Fuse c) GFCI d) They are all on outlets
GFCI
Who was the first natural philosopher to theorize that objects in motion do not come to rest because that is their natural state; rather they are slowed by an outside force, later called friction? a) Aristotle b) Galileo c) Newton d) Einstein
Galileo
Who is famous for experimentally measuring a fairly precise value fro the universal gravitational constant (G)? a) Tycho Brahe b) Henry Cavendish c) William Faulkner d) Johannes Kepler
Henry Cavendish
If the same astronaut went to the moon, which of the following would change on the surface of the moon? a) His weight b) His mass c) Neither d) Both
His weight
If the mass of the earth was twice its present value, but its radius was the same, how would g change? a) Increase b) Decrease c) Stay the same d) Not enough information
Increase
The reason why you bend you knees when jumping from a high height is because you wish to... a) Increase time of impact, and therefore increase the average stopping force. b) Decrease time of impact, and therefore decrease the average stopping force. c) Increase time of impact, and therefore decrease the average stopping force. d) Decrease time of impact, and therefore increase the average stopping force.
Increase time of impact, and therefore decrease the average stopping force.
The reason a charged balloon will stick to a wall is that... a) The charge is slightly sticky and acts like glue b) Electrons transfer back and forth between the wall and the balloon c) Induced opposite charges in the wall are closer than other wall charges d) Balloon material simply sticks to walls
Induced opposite charges in the wall are closer than other wall charges
Ohm's law states that resistance and current have what kind of relationship? a) Direct/Linear b) Quadratic c) Inverse d) Inverse-square
Inverse
The angle of incidence a) Is always equal to the angle of reflection b) Is always less than the angle of reflection c) Is always greater than the angle of reflection d) May be greater than, less than, or equal to the angle of reflection
Is always equal to the angle of reflection
An acorn falls from a tree. As it is falling, what happens to its kinetic energy(KE) and its potential energy(PE) a) KE increases and PE decreases b) KE decreases and PE decreases c) KE increases and PE increases d) KE decreases and PE increases
KE increases and PE decreases
An object that has kinetic energy must be a) Moving b) Falling c) Elevated d) At rest
Moving
A convex mirror has a focal length that is... a) Positive, because all focal lengths are positive b) Negative, because all focal lengths are negative c) Positive, because the focus is located "in front" of a convex mirror d) Negative, because the focus is located "behind" a convex mirror
Negative, because the focus the focus is located "behind" a convex mirror
The satellite moving through frictionless space in the previous problem is an example of which of the following: a) Newton's 1st Law of Motion b) Newton's 2nd Law of Motion c) Newton's 3rd Law of Motion d) Newton's Universal Law of Gravitation
Newton's 1st Law of Motion
The previous problem is an example of which of the following: a) Newton's 1st Law of Motion b) Newton's 2nd Law of Motion c) Newton's 3rd Law of Motion d) Newton's Universal Law of Gravitation
Newton's 2nd Law of Motion
The previous problem is an example of which of the following: a) Newton's 1st Law of Motion b) Newton's 2nd Law of Motion c) Newton's 3rd Law of Motion d) Newton's Universal Law of Gravitation
Newton's 3rd Law of Motion
Torque is measured by which of the following units: a) Newton b) Neweton*meter c) Joule d) Meter
Newton*meter
Who was the first scientist to prove that the speed of light was finite? a) Galileo Galilei b) Ole Roemer c) Leon Foucault d) Robert Young
Ole Roemer
The critical angle for a beam of light passing from water into air is 48.8o. This means that all light rays with an angle of incidence smaller than this angle will be a) Absorbed b) Totally reflected c) Partially reflected and partially transmitted d) Totally transmitted
Partially reflected and partially transmitted
What physical quantity links charge and energy? a) Electromagnetism b) Coulomb's law c) Potential difference d) Electric Field
Potential difference
Which of the following does NOT state Ohm's Law correctly? a) V = IR b) R = VI c) I = V/R d) All of the above are correct
R = VI
If the mass of the earth was twice its present value, but its radius was the same, how would G change? a) Increase b) Decrease c) Stay the same d) Not enough information
Stay the same
What materials have zero resistance a) Resistors b) Superconductors c) Potentiometers d) Ammeters
Superconductors
When you swung a cup of water over your head in class, the water did not fall out, why? a) The centripetal force required to keep the water in circular motion was greater than the weight of the water, therefore the cup must provide some normal force. b) The centripetal force required to keep the water in circular motion was less than the weight of the water, therefore the cup must provide some normal force
The centripetal force required to keep the water in circular motion was greater than the weight of the water, therefore the cup must provide some normal force.
When a wave reaches the boundary of a new medium, part of the wave is reflected and part is transmitted. If the reflected wave receives most of the energy, which of the following must be true? a) The difference in media density is great b) The difference in media density is small c) The change in medium from a less dense medium to a more dense d) The change in medium is from a more dense medium to a less dense
The difference in media density is great
A boy and a girl are riding on a carousel, which is turning at a constant rate. The girl is near the outer edge, and the boy is closer to the center. Who has the greater tangential speed? a) The boy b) The girl c) Both have the same non-zero velocity d) Both have zero tangential velocity
The girl
Which statement is true about a skydiver that has reacher his/her terminal speed. a) The skydiver is still accelerating downward b) The skydiver has a net force pointing downward c) The air friction force on the skydiver is greater than his weight d) The net force on the skydiver is zero
The net force on the skydiver is zero
A real image formed by a single converging lens is always upside down a) True b) False
True
A piece of plastic has a net charge of -2.00 x 10^-6 C. What is actually going on? a) The piece of plastic has 1.25 x 10^-13 more electrons than protons b) The piece of plastic has 1.25 x 10^-13 more protons than electrons c) The piece of plastic has 1.25 x 10^13 more electrons than protons d) The piece of plastic has 1.25 x 10^13 more protons than electrons
The piece of plastic has 1.25 x 10^13 more electrons than protons
As the filament in a bulb heats up a) The resistance of the bulb decreases b) The resistance of the bulb increases
The resistance of the bulb increases
Often times when leaving the highway, the exit ramps make a U-Turn and are banked. The reason why this is done is so that the centripetal force required for the car to complete the turn is now being provided by... a) The normal force b) The x-component of the normal force c) The y-component of the normal force d) The weight
The x-component of the normal force
Which of the following causes our blind sports? a) There are no rods or cones on the fovea b) There are no rods or cones on the optic disk c) There are too many rods and not enough cones on the fovea d) There are too many cones and not enough rods on the optic disk
There are no rods or cones on the optic disk
Which of the following does NOT affect the resistance of a wire a) Cross-sectional area b) Temperature c) Material d) They all affect the resistance of a wire
They all affect the resistance of a wire
All sounds are created by a vibration a) True b) False
True
Which of the following is not a simple machine: a) Wheel and axle b) Incline plane c) Pulley d) They are all simple machines
They are all simple machines
In a good insulator, electrons are usually a) Free to move around b) Free to move around after an impurity has been added c) Semi-free to move around d) Tightly bound in place
Tightly bound in place
Big brother and little sister can balance on a teeter-totter even though they have different weights because of balanced... a) Forces b) Torques c) Energies d) All of these
Torques
The net force required for an object to be in circular motion must be directed a) Toward the center b) Away from the center c) Tangent to the center
Toward the center
Sunglasses lenses are an example of... a) Transparent material b) Translucent material c) Opaque material d) Luminous material
Transparent material
A bug and the windshield of a fast moving car collide. The change in momentum of the bug and change in momentum of the car are the same size. a) True b) False
True
A bug and the windshield of a fast moving car collide. The forces on the bug and the force on the car are the same size. a) True b) False
True
A bug and the windshield of a fast moving car collide. The impulse on the bug and the impulse on the car are the same size. a) True b) False
True
A current of 1A could severely harm a human being. a) True b) False
True
A falling object that has reached its terminal velocity is in equilibrium. a) True b) False
True
If an object is in between a concave mirror and its focal point the image will be: a) Real and smaller than the object b) Real and larger than the object c) Virtual and larger than the object d) Virtual and larger than the object
Virtual and larger than the object
Which of the following correctly gives which physical quantities are scalars and which are vectors? a) Work, KE, and PE are all vectors b) Work is a scalar, while KE and PE are vectors c) Work is a vector, while KE and PE are scalars d) Work, KE and PE are all scalars
Work, KE and PE are all scalars
Which one of the following is not a rule for determining significant digits? a) All final zeros after the decimal points are significant. b) Zeros between two other significant digits are not significant. c) All non-zero digits are significant.
Zeros between two other significant digits are not significant.
Mass is a mass, weight is.... a) a mass, also b) otherwise known as inertia c) a force d) an acceleration
a force
A simple astronomical telescope consists of... a) several sets of lenses that focus an image on the eye b) a pair of converging lens c) a single lens that focuses and image on a piece of film d) condenser lenses, prisms, and a projection lens.
a pair of converging lens
Which of the following is NOT a charge pump ( an electrical component that supplies a voltage gain)? a) a generator b) a resistor c) a battery d) a photovoltaic cell
a resistor
A math book and a physics book are tied together with a length of string. With the string taut, one book is pushed off the edge of a table. As it falls, the other book is dragged horizontally across the table surface. With no friction, acceleration of the books is a) zero. b) g. c) a value between zero and g. d) a value that could be grater than g.
a value between zero and g.
How many significant digits? a) 1368s b) 0.1020g c) 30.02kg d) 50.30m
a) 4 b) 4 c) 4 d) 4
How close something is to the accepted value is said to be its... a) accuracy b) precision c) impeccability d) reliability
accuracy
Validity has to do with _____, while reliability has to do with ____. a) precision, accuracy b) accuracy, precision c) acceptance, precision d) precision, impeccability
accuracy, precision
Your friend states that under all conditions, any radio wave travels faster than any sound wave. You a) agree with your friend b) disagree with your friend
agree with your friend
The speed of sound in air depends on a) frequency. b) wavelength. c) air temperature. d) All of these. e) None of these.
air temperature.
Kepler's second law states that: a) all planets orbit the sun in circular paths b) all planets orbit the sun constant speeds c) all planets sweep equal areas in their elliptical paths over equal time intervals during orbit d) the period of all the planets divided by their radius is a constant
all planets sweep equal areas in their elliptical paths over equal time intervals during orbit
The ___ of a wave is its maximum displacement from its position of rest. a) frequency b) wavelength c) amplitude d) period
amplitude
Two cylinders are released from the top of an incline. One cylinder is empty, while the other is solid. Both cylinders have roughly the same mass and radius. Which object has the greater moment of inertia? a) a solid cylinder b) an empty cylinder c) both have the same non-zero moment of inertia d) both have zero moment of inertia, unless they are spinning
an empty cylinder
Which of the following instruments is the most precise for measuring length? a) meter stick b) ruler c) caliper d) stapler
caliper
A capacitor is an electronic designed to store what? a) force b) charge c) velocity d) power
charge
The process explained in the previous problem is an example of a) separation of charges b) charging by induction c) charging by conduction d) forces polarity
charging by conduction
When an object is released from the top of a building and allowed to fall freely, it goes: a) constant velocity b) decreasing velocity c) constant acceleration d) increasing acceleration
constant acceleration
A straight line in the positive direction on a velocity-time graph means: a) constant velocity b) constant acceleration in the positive direction c) constant acceleration in the negative direction d) standing still
constant acceleration in the positive direction
A horizontal line on a velocity-time graph means: a) instantaneous acceleration b) freefall c) constant acceleration d) constant velocity
constant velocity
A straight line on a position-time graph means... a) constant acceleration b) instantaneous acceleration c) constant velocity d) freefall
constant velocity
During a comet's elliptical orbit, as the comet travels from the perigee (closest point) towards the apogee (farthest point), its speed: a) decreases b) increases c) remains the same d) not enough information given
decreases
Noise reduction headsets are worn by airport baggage handlers, and they take use of which of the following wave property? a) constructive interference b) destructive interference c) resonating vibrations d) black holes
destructive interference
The reason why you can't convert m/s to kg is because it makes no sense using: a) vector addition b) impartiality c) accuracy d) dimensional analysis
dimensional analysis
In the equations F = ma, F and a have what kind of relationship? a) direct/linear b) inverse c) quadratic d) it's complicated
direct/linear
A force on a test charge in an electric field is... a) inversely proportional to the magnitude of the field b) directly proportional to the magnitude of the field c) inversely proportional to the square of the magnitude of the field d) unrelated to the magnitude of the field
directly proportional to the magnitude of the field
If the luminous flux of a light source doubles, the illumination on a surface a fixed distance away will a) double b) triple c) quadruple d) remains the same
double
Which of the following are transferred in the two previous questions? a) electrons b) protons c) neutrons d) none of the above (it remains neutral)
electroncs
Waves typically transmit ____: a) matter b) energy c) both matter and energy d) neither matter nor energy
energy
The image you actually see when looking through a simple refracting telescope is... a) enlarged and upright b) reduced and upright c) reduced and inverted d) enlarged and inverted
enlarged and inverted
A magnifying glass works by creating an a) enlarged, upright, and real image b) enlarged upright, and virtual image c) enlarged, inverted, and real image d) enlarged, inverted, and virtual image
enlarged, upright, and virtual image
When a hammer hits a nail, the force that the hammer applies on the nail is ______ the force that the nails applies on the hammer. (Which of the following correctly fills in the blank?) a) greater than b) less than c) exactly equal to d) equal and opposite to
equal and opposite to
Sound waves can travel through solids, liquids, gases, and even a vacuum a) true b) false
false
The number cycles per second of a wave, is called its: a) period b) wave length c) frequency d) wave pulse
frequency
Compared with the sound you hear from the siren of a stationary fire engine, the sound you hear when it approaches you has an increases a) speed. b) frequency. c) Both of these. d) Neither of these.
frequency.
The focal length of a spherical mirror equals: a) the radius of curvature b) twice the radius of curvature c) half the radius of curvature d) half the length of the principal axis
half the radius of curvature
A person who is farsighted, needs to have a corrected lens that... a) has a negative focal length and is diverging b) has a positive focal length and is diverging c) has a negative focal length and is converging d) has a positive focal length and is converging
has a positive focal length and it converging
An ammeter should be hooked up ______ a circuit. a) in series with b) in parallel with one element in c) in synchronization with d) as a source of resistance in
in series with
The modern view of the nature of light is that light a) behaves like a wave b) behaves like a particle c) in some circumstances behaves like a wave, and in other circumstances behaves like a particle d) behaves like neither waves nor particles
in some circumstances behaves like a wave, and in other circumstances behaves like a particle
Which of the following instruments is the most accurate for measuring length? a) meter stick b) ruler c) caliper d) it depends
it depends
Which of the following is equivalent to a Newton: a) kilogram * meter/ seconds^2 (kg*m/s^2) b) kilogram (kg) c) kilograms * meter/second (kg*m/s) d) meters/seconds^2 (m/s^2)
kilogram * meter/ seconds^2 (kg*m/s^2)
When light is incidence from air into water at an angle of 45o with the normal, then the angle of refraction must be... a) greater than 45o b) less than 45o c) equal to 45o d) none of the above
less than 45o
A body that emits light is said to be a ___ body a) illuminated b) luminous c) opaque d) transparent
luminous
When a projector mixes blue light with red light, it makes a) magenta light b) cyan light c) yellow light d) none of the above
magenta light
A satellite is orbiting around Earth. On which of the following does the speed not depend? a) mass of the satellite b) distance from Earth c) mass of the Earth d) it depends on all of these
mass of the satellite
Physics is the study of: a) motion and collisions b) forces and electricity c) matter and energy d) mass and weight
matter and energy
When a cannon fires a cannonball, the cannon will recoil backwards because the a) energy of the cannonball and cannon is conserved b) momentum of the cannonball and cannon is conserved c) energy of the cannon is grater than the energy of the cannonball d) momentum of the cannon is greater than the energy of the cannonball
momentum of the cannonball and cannon is conserved
Considering the light that makes them visible to us, which of the following does not belong with the others? a) sun b) moon c) stars d) white-hot lamp filament
moon
Which of the following is a vector: a) speed b) distance c) both a and b d) neither a and b
neither a and b
A line perpendicular to eh surface at the point of incidence, is called the... a) index of refraction b) critical angle c) normal d) barrier
normal
According to quantum theory, light is radiated and absorbed in singular units called a) protons b) joules c) photons d) positrons
photons
If a positively charged rod touches an electroscope, then the electroscope becomes... a) positive b) negative c) it remains neutral d) none of the above
positive
The ___________ of a measurement has to do with the measurements reliability. a) precision b) correctness c) accuracy d) impartiality
precision
Two objects attract each other gravitationally. If the distance between their centers is cut in half, the gravitational force between them a) quadruples b) doubles c) is cut in half d) is cut to a fourth
quadruples
Our eyes produce an image that is... a) real, upright, and reduced b) virtual, upright, and reduced c) real, inverted, and reduced d) virtual, inverted, and reduced
real, inverted, and reduced
A physical quantity which only has a magnitude is called a... a) vector b) scalar c) unit d) caliper
scalar
You swing to and fro on a playground swing. If you stand rather than sit, the time for a to-and-fro swing is a) lengthened. b) shortened. c) unchanged.
shortened.
A radar gun can determine the speed of a moving automobile by measuring the difference in frequency between emitted and reflected radar waves. This process illustrates a) resonance b) diffraction c) the Doppler effect d) refraction
the Doppler effect
What is not true about the critical angle: a) the angle of refraction is equal to 90o at the critical angle b) the refracted wave is propagated along the barrier c) critical angles only occurs when light is transferring from a more optically dense medium to a less optically dense medium d) the critical angle refers to an angle of refraction
the critical angle refers to an angle of refraction
When a person has myopia, which of the following is true a) the person's eyeball is too short b) the person's cornea is misshaped c) the image is coming into focus to far in front of the retina d) the person has farsightedness
the image is coming into focus too far in front of the retina
Which of the following best explains the types of charges the oil droplets acquired during Millikan's famous oil-droplet experiment? a) they acquired a consistent (same every trial) negative charge b) they acquired a varying (different every time) negative charge c) they acquired a consistent (same every trial) positive charge d) they acquired a varying (different every trial) positive charge
they acquired a varying (different every time) negative charge
Electricity is carried at long distances at high voltages because, a) this reduces the current and less energy is dissipated by the wires b) this reduces the resistance and less energy is dissipated by the wires c) this increases the current and less energy is dissipated by the wires d) this increases the resistance and less energy is dissipated by the wire
this reduces the current and less energy is dissipated by the wires
The path that a projectile traces through the air is called its: a) range b) trajectory c) maximum height d) components
trajectory
Light of which of the following colors has the shortest wavelength? a) red b) yellow c) blue d) violet
violet
A diverging mirror always produces what type of images a) real, upright, and reduced b) virtual, upright, and reduced c) real, inverted, and reduced d) virtual, inverted, and reduced
virtual, upright, and reduced
If you were in a spaceship in deep space (away from any stars or planets) and fired a satellite, after the initial launch how much force would have to be exerted on the satellite to keep it moving? a) a force equal to twice its mass b) a force greater than twice its mass c) a force equal to twice its weight d) zero
zero
When you mix a primary color of light with its complementary color, you get a) black light b) white light c) silver light d) indigo light
white light