Deck 28: Physics

Question 1

Rachel has just kicked a kickball weighing 1 kg. If the kickball is moving at a speed of 12 m/s, how much energy did Rachel give the ball with her kick?

A)36 joules
B)72 joules
C)100 joules
D)120 joules
E)148 joules

Answer 1

72 joules

Question 2

A train moves at 15 m/s for 15 minutes. How far has the train traveled?

A)135 meters
B)3,500 meters
C)13.5 kilometers
D)18.1 kilometers
E)27.0 kilometers

Answer 2

13.5 kilometers

Question 3

Which of the following describes a graph of velocity of an object is moving at a constant velocity?

A)A line with a slope of zero.
B)A line with a slope of 1.
C)A line with a negative slope.
D)A line with a steadily increasing slope.
E)A line with a steadily decreasing slope.

Answer 3

A line with a slope of zero.

Question 4

Craig is on top of the school roof. He drops three objects, a watermelon weighing 5 kg, a soccer ball weighing 1 kg, and a golf ball weighing 0.1 kg off the roof at the same time. Which object will hit the ground first?

A)The soccer ball.
B)The watermelon.
C)The golf ball.
D)The soccer ball and the watermelon will hit first, followed by the golf ball.
E)All three objects will hit the ground at the same time.

Question 5

Jackson hits a golf ball into the air at an angle of 37°off the ground. If the ball is moving horizontally at 40 m/s, how long will it take to hit the ground?

A)1 second
B)2 seconds
C)3 seconds
D)4 seconds
E)5 seconds

Question 6

According to Newton's First Law, what is needed to move an object?

A)Energy
B)Willpower
C)Entropy
D)Force
E)Acceleration

Question 7

Tom pushes his broken car across the road with a force of 200 newtons. If his car weighs 800 kg, how fast will it accelerate?

A)0)25 m/s²
B)0)50 m/s
C)1)50 m/s²
D)2)00 m/s
E)4)00 m/s²

Question 8

Which of the following equations can be used to calculate momentum?

A)F = ma
B)P = ma
C)P = mv
D)Q = IR
E)F = pv

Question 9

Alex is running a race, and he is 100 meters from the finish line. However, his opponent is 10 meters in front of him! If Alex and his opponent are both running at 8 m/s, how much faster must Alex run to beat his opponent?

A)0)15 m/s
B)0)25 m/s
C)0)67 m/s
D)0)90 m/s
E)1)51 m/s

Question 10

A skydiver jumps out of a plane 2 miles above the ground. Assuming air resistance is zero, which of the following is true?

A)His acceleration through the air is zero.
B)His velocity will slowly decrease.
C)His acceleration through the air is constant.
D)His rate of acceleration is slowly increasing.
E)The air around him will burn him as he passes quickly through the atmosphere.

Question 11

Bobby throws a ball straight up in the air, and it reaches a maximum height of 20 meters, a pretty good throw! Which of the following is true about the velocity of the ball just before it hits the ground?

A)It is faster than the velocity with which the ball was thrown.
B)It is the same as the velocity with which the ball was thrown.
C)It is slower than the velocity with which the ball was thrown.
D)The velocity is 0.
E)The velocity is the same as when the ball reaches its maximum height.

Question 12

Torque is best defined as:

A)Force applied at an angle over a length.
B)Force applied in a horizontal direction.
C)Centripetal force.
D)Centrifugal force.
E)Circular motion.

Question 13

William weighs 150 lbs. on Earth. If William travels to Mars, where the gravity is 1/4th that of Earth, how much will he weigh?

A)25 lbs.
B)37 lbs.
C)50 lbs.
D)67 lbs.
E)75 lbs.

Question 14

Which of the following is almost always true about the properties of fluids?

A)They are always very easy to heat up.
B)If subjected to pressure, their volume will be reduced.
C)They are always very viscous.
D)They are able to transfer electricity easily.
E)They are incompressible.

Question 15

According to Kepler's Laws, what body do the planets orbit around?

A)Earth
B)Sun
C)Moon
D)Jupiter
E)Milky Way

Question 16

Alex and Susan are ice-skating. At one point, Alex runs into Susan and holds on, and the two slide across the ice. After Alex collides with Susan, which of the following is true?

A)Velocity is conserved.
B)Energy is conserved.
C)Momentum is conserved.
D)Friction is conserved.
E)Alex is conserved.

Question 17

The period of a pendulum swing is given by the following equation: T = 2??(L/g), where L is the length of the pendulum, g is the gravitational constant, and T is the period. With this information, if an identical pendulum were swung on the Earth and the moon, where gravity is 1/8th that of Earth's, how much longer will the period of the pendulum swing on the moon be?

A)The same.
B)?4 times.
C)?6 times.
D)?8 times.
E)2?6 times.

Question 18

If the spring constant for a bungee cord is 0.056, then how much force will be needed to stretch the bungee cord 10 meters?

A)0)56 N
B)1)12 N
C)2)05 N
D)3)58 N
E)4)13 N

Question 19

A car's suspension is made of very large springs that are designed to cushion force felt by the car. If the car weighs 1200 kg, what should the spring constant be to ensure that a person in the car never shifts more than 20 cm?

A)10500
B)12900
C)26850
D)41280
E)58800

Question 20

Rachel is running at a pace of 4 m/s, and her friend Ally is running at 5 m/s. If they have 1 mile to go before reaching home, how much sooner will Ally get home before Rachel?

A)30 seconds
B)80 seconds
C)120 seconds
D)150 seconds
E)180 seconds

Question 21

Which of the following is true about substances that conduct electricity well?

A)There is more space between their molecules.
B)They possess many positive ions.
C)They are heavier than substances that do not conduct electricity well.
D)They have many free electrons.
E)None of the above.

Question 22

Electrical resistance is the resistance of a wire or other conductor to the transfer of electrons through it. Which of the following will affect resistance?

A)The width of the wire.
B)The length of the wire.
C)The composition of the wire.
D)The air surrounding the wire.
E)The insulation of the wire.

Question 23

According to Young's double slit experiment, what is light?

A)Direct radiation
B)A wave
C)A particle
D)A force
E)None of the above.

Question 24

Which of the following statements best describes diffraction?

A)The bending of light around obstacles.
B)The twisting of light due to air.
C)The diffusion of light through water.
D)The spread of light from the sun.
E)The ability of light to travel quickly.

Question 25

Polarized sunglasses are able to block a significant amount of sunlight that reaches your eyes. This is done by polarizing the light coming through the lenses, which means that the light is:

A)Given a magnetic charge.
B)Given an ionic charge.
C)Aligned to oscillate in one direction.
D)Aligned such that the light can no longer pass through the lens.
E)Given more energy.

Question 26

Which of the following methods cannot be used to affect the direction that light is moving?

A)Refraction.
B)Reflection.
C)Diffraction.
D)Polarization.
E)Dispersion.

Question 27

Light moves very quickly, at the speed of 3 x 10⁸ m/s. The range of visible light that we can see is around 600 nm. At this range, what is the frequency of the light?

A)2)5 x 10⁸ Hz
B)3)0 x 10¹² Hz
C)5)0 x 10¹⁴ Hz
D)5)8 x 10¹⁶ Hz
E)7)1 x 10¹⁸ Hz

Question 28

Which of the following types of waves can carry the most energy?

A)Microwave
B)Ultraviolet
C)Infrared
D)Gamma
E)Radio

Question 29

Alan has tuned his radio to 101.5 FM, which is 101.5 Khz. If the wavelength of this frequency is about 1 meter, then how long does it take music to reach him from his radio station 10 km away?

A)0)0001 seconds
B)0)001 seconds
C)0)01 seconds
D)0)1 seconds
E)0)28 seconds

Question 30

If light strikes a mirror at an incidence angle of 30°, what will be the angle of reflection?

A)15 degrees
B)30 degrees
C)45 degrees
D)60 degrees
E)75 degrees

Question 31

Light strikes a refractive object at an incident angle of 40°. What will be the angle of refraction?

A)20 degrees
B)40 degrees
C)60 degrees
D)80 degrees
E)It cannot be determined from the information given

Question 32

The index of refraction for air is 1. If light passing through air hits an object with an index of refraction of 0.8 at an angle of 30 degrees, which of the following equations can be used to solve for the degree at which the light is refracted?

A)cos(x) = 0.875
B)sin(x) = 0.875
C)cos(x) = 0.625
D)sin(x) = 0.625
E)tan(x) = 0.750

Question 33

Which of the following is an example of dispersion?

A)Young's experiment.
B)Light passing through water.
C)A rainbow.
D)Light passing through air.
E)None of the above.

Question 34

Rachel is standing in front of a concave mirror. Which of the following will be true about her appearance in the mirror?

A)She will appear shorter.
B)She will appear taller.
C)She will not appear.
D)She will appear very round.
E)She will not appear to have a head.

Question 35

If a person is nearsighted, their eyes have a focus that is behind the retina. To correct this, people with nearsightedness usually wear:

A)Convex lenses.
B)Flat lenses.
C)Magnifying lenses.
D)Concave lenses.
E)Warped lenses.

Question 36

A sound that is 100 decibels compared to a sound of 50 decibels will have what significant difference?

A)Larger amplitude
B)Shorter frequency
C)Higher frequency
D)Reduced transmission
E)Quieter sound

Question 37

When calculating the friction force, what other force always comes into play?

A)Sliding force
B)Dynamic force
C)Normal force
D)Graduated force
E)Remaining force

Question 38

Ed's car tires have a coefficient of friction of 0.45 against the road. If his car weighs, 1100 kg, how much force would be required to cause his car's tires to slip and slide?

A)2780 N
B)4850 N
C)5110 N
D)5345 N
E)6005 N

Question 39

Which of the following is true about kinetic or dynamic friction?

A)The kinetic friction coefficient is the same as the static friction coefficient.
B)The kinetic friction coefficient is greater than the static friction coefficient.
C)The kinetic friction coefficient is less than the static friction coefficient.
D)The kinetic and static friction coefficients are both used at the same time.
E)Most objects do not have a kinetic friction coefficient.

Question 40

John pushes a refrigerator with 40 N of force over 10 meters. How much work has he done?

A)No work at all.
B)40 joules.
C)400 joules.
D)800 joules.
E)1000 joules.

Question 41

Sam is hit by a baseball moving at 10 m/s, but claims it didn't hurt at all! His "friend" Alex then hits another ball at him, this time at 20 m/s, and it really hurt Sam! What accounts for this difference in impact felt?

A)Double the speed results in 4 times the kinetic energy.
B)Double the speed results in more force applied in a smaller area.
C)The ball was moving faster, and thus compressed air in front of it into a small sonic blast.
D)The second ball was a curveball.
E)Sam is lying, and the second ball didn't hurt either.

Question 42

What are the units of power?

A)Hertz
B)Newtons
C)Joules
D)Kilograms
E)Watts

Question 43

Which of the following statements is true regarding the nature of electrical charge?

A)Positive and negative charges repel one another.
B)A positive charge cannot be conducted through metal.
C)Protons and electrons have the same base charge.
D)Protons have more charge than electrons.
E)Electrons have more charge than protons.

Question 44

Coulomb's Law is given as , where q is the charge, F is the electric force, k is Coulomb's constant, and r is the distance between the two charges. Using this information, which of the following statements is true?

A)If charge 1 is larger than charge 2, then the force will be greater than if charge 2 is larger than charge 1.
B)If the value of k increases, then the force generated decreases.
C)The farther away the two charges are, the greater the force generated.
D)As the two charges get closer and closer, the attractive or repulsive force grows exponentially larger.
E)None of the above are true.

Question 45

If there is no distance separating a positive charge from a negative charge, then theoretically the attractive force is:

A)1 N.
B)Coulomb's constant.
C)0 N.
D)900 N.
E)Infinite.

Question 46

In the water cycle between the oceans, atmosphere, and land, the water vapor in the air is derived from evaporation from:

A)Oceans.
B)People.
C)Trees.
D)Rivers.
E)Lakes.

Question 47

In order for evaporation to occur, which of the following energies must be transferred?

A)Activation energy
B)Latent heat of vaporization
C)Boiling energy
D)Sun energy
E)None of the above

Question 48

Nearly every single object emits radiation of some sort. What kind of radiation do humans emit?

A)Ultraviolet
B)Infrared
C)Gamma
D)Radio
E)Light

Question 49

For a black body, Stefan-Boltzmann's law predicts that radiation is equal to P = ?AZ, where ? is 5.7x10^-8W*m^-2*K^-4, also known as Stefan's constant. A is the area and Z is a constant describing the difference between the black body temperature and that of the surrounding environment. Given this information, Z = 1.5 x 10⁹ and the area of an average human child as 1.0 m², how much radiation energy does a child emit?

A)50 watts
B)85 watts
C)140 watts
D)251 watts
E)300 watts

Question 50

Jack is yelling at a decibel level of 70. How much louder is this than his normal speech at 50 decibels?

A)2 times
B)4 times
C)10 times
D)100 times
E)1000 times

Question 51

The residence time of a pollutant in the atmosphere is best defined as:

A)The concentration of pollutant.
B)The amount of time the pollutant stays in the air.
C)The circulation of the pollutant to different regions.
D)The time it takes for a pollutant to be produced.
E)The ability of a pollutant to attach to an object.

Question 52

Alpha particles are a type of radiation. What would you expect to happen if you fired a stream of alpha particles at a sheet of gold foil?

A)The particles would adhere to the sheet.
B)All of the particles would pass straight through.
C)All of the particles would be reflected.
D)Most of the particles will go through, but a few will bounce.
E)The particles will destroy the gold foil.

Question 53

The Heisenberg Uncertainty Principle is used to govern the movement and location of:

A)Atoms.
B)Protons.
C)Electrons.
D)Neutrons.
E)Emitted electromagnetic waves.

Question 54

In the following reaction depicting the decay of a uranium molecule, what is X?

A)Alpha particle
B)Beta particle
C)Gamma particle
D)X-particle
E)Light wave

Question 55

Chris is wiring up a new radio, and he connects 3 resistors in series. If these 3 resistors are in a closed circuit, which of the following statements is true about the current passing through each of them?

A)The first resistor has the most current.
B)The third resistor has the most current.
C)The current passing through each resistor is the same.
D)The current decreases exponentially from the 1st to the 3rd resistor.
E)There is only current through the first resistor. Afterward, the current is zero.

Question 56

What is the capacitance of a capacitor with an area of 500 cm2 and a distance between plates of 0.01 cm? Coulomb's constant is given as 8.85 x 10-12

A)0)004 ?F
B)0)008 ?F
C)0)012 ?F
D)0)55 ?F
E)0)85 ?F

Question 57

Adam builds a circuit in which there are three resistors in parallel. The first resistor is 3 Ohms, the second is 5 Ohms, and the third is 1 Ohm. What is the equivalent resistance across the entire circuit?

A)0)56 Ohms
B)0)97 Ohms
C)1 Ohm
D)1)53 Ohms
E)2)18 Ohms

Question 58

Charlie claims to his friend that in the circuit he has built, the current he is putting in is reduced by ½ at the end of the circuit, yet no heat is released. This is not possible, because it violates:

A)Kirchoff's first law.
B)Kirchoff's second law.
C)Kirchoff's third law.
D)Kirchoff's fourth law.
E)Kirchoff's fifth law.

Question 59

What kind of current do batteries produce?

A)Alternating current
B)Random current
C)Powerful current
D)Direct current
E)Singular current

Question 60

Out of the following materials, which is not a good conductor?

A)Iron
B)Copper
C)Aluminum
D)Steel
E)Boron

Question 61

Andy has a metal sphere that has a charge of 0.5 coulombs on it. He wants to remove some of this charge and place it on a second sphere, and use the two spheres to repel each other. How much charge should be transplanted to produce the greatest force?

A)0)1 C
B)0)25 C
C)0)35 C
D)0)40 C
E)0)50 C

Question 62

The discharge of a capacitor is best described by which of the following statements?

A)The initial discharge rate is exponentially greater than the discharge rate near T = ?.
B)The initial discharge rate is exponentially smaller than the discharge rate near T = ?.
C)The discharge rate is the same during the entirety of the time the capacitor is discharging.
D)The discharge rate will linearly decrease as T approaches ?.
E)The discharge rate will linearly increase as T approaches ?.

Question 63

What is the voltage across a 10 Ohm resistor, if we flow 0.25 amps of current through it?

A)0)25 V
B)2)5 V
C)25 V
D)250 V
E)500 V

Question 64

Chad has a super powerful battery capable of producing 30,000 volts! However, to use it safely, he needs to make sure the current flowing through isn't more than 1.5 amps at all times. Which of the following resistors should he use?

A)1500 Ohms
B)11000 Ohms
C)20000 Ohms
D)25000 Ohms
E)48000 Ohms

Question 65

Which of the following can be calculated using Gauss' Law?

A)Flux
B)Current
C)Voltage
D)Resistance
E)Capacitance

Question 66

If a magnetic field of 10 x 10-5 T is applied perpendicularly to a 1 meter wire carrying 5 amps of current, what will be the force experienced by the wire?

A)0)0000085 N
B)0)00005 N
C)0)095 N
D)0)135 N
E)0)875 N

Question 67

Which of the following is not true about magnetic fields?

A)A magnetic field can be produced by a moving current.
B)A magnetic field and a moving current can interact to generate a force.
C)The direction of a magnetic field produced by a moving current is governed by the right hand rule.
D)The angle at which a magnetic field is applied to a point charge does not affect the force generated.
E)All of the above are true.

Question 68

Magnetic field lines flow from:

A)South to North.
B)North to South.
C)East to West.
D)North to East.
E)West to East.

Question 69

Transformers on power lines are an example of which electrical phenomenon?

A)Induction
B)Resistance
C)Generation
D)Magnetism
E)Radiation

Question 70

Richard conducts an experiment, and finds the following plot of an object's velocity over time. Which of the following is true about this object?

A)The object is accelerating.
B)The object is decelerating.
C)The object is staying at a constant velocity.
D)The object is in the air.
E)The object will eventually reach a velocity of 0.

Question 71

In astronomy physics, what is the blue-red shift?

A)A term for the visible spectrum of light.
B)The ability of planets to absorb blue light.
C)The influence of the Doppler effect on light traveling from distant stars.
D)An increase from cold to hot of the sun's temperature.
E)The shift in sound as an object gets closer to you.

Question 72

White dwarf stars or black holes would be examples of:

A)Suns.
B)Supernovas.
C)Weakly interacting massive particles.
D)Superdense local phenomena.
E)None of the above.

Question 73

According to modern physics, one theory for the beginning of the universe is the:

A)Big Rip
B)Ultra Explosion
C)Sub Particle Implosion
D)Big Bang
E)Tremendous Fire

Question 74

Some of the theories developed by Einstein gave in part the equation E = mC?, which associates energy with:

A)Mass and concentration.
B)Momentum and the speed of light.
C)Mass and the speed of light.
D)Force and corrective distance.
E)Relative force and the speed of light.

Question 75

Which of the following statements concerning radiation is not true?

A)Humans emit infrared radiation.
B)All objects to some extent emit a form of radiation.
C)Radiation entering the earth's atmosphere includes ultraviolet, gamma, and electromagnetic radiation.
D)Many types of radiation are harmful to humans.
E)All of the above statements are true.

Question 76

After striking a tuning fork, Sam finds that if he places the humming fork next to his piano, some of the piano strings vibrate as well. This phenomenon is called:

A)Dissonance.
B)Mystery strumming.
C)Resonance.
D)Scattering.
E)Diffraction.

Question 77

An airplane is flying at 400 mph, and encounters a wind blowing across the plane (from right to left), at a speed of 35 mph. The plane's speed relative to the ground will:

A)Decrease.
B)Stay the same.
C)Increase.
D)Decelerate.
E)Decrease by a factor of 1.35.

Question 78

Christine accidentally drives her car into a tree, and the car experiences 4250 N of force, crushing the front hood. How much force does the poor tree experience?

A)0 N
B)2250 N
C)3750 N
D)4250 N
E)5500 N

Question 79

Consider a mixture of nitrogen, oxygen, carbon dioxide, and hydrogen, molecules that are commonly found in Earth's atmosphere. At the same temperature and pressure, which of these molecules is moving the fastest?

A)Nitrogen
B)Oxygen
C)Carbon dioxide
D)Hydrogen
E)All of them are moving equally quickly.

Question 80

Which of the following is true about the speed of sound?

A)The speed of sound is always 650 mph.
B)The speed of sound is always 760 mph.
C)The speed of sound depends on the listener.
D)The speed of sound depends on device producing the sound.
E)The speed of sound depends on the material the sound is traveling through.