Question 1

Which of the following is a scalar quantity?

Accepted Answer

A)  the mass of a brick
B)  the velocity of a falling tennis ball
C)  the force required to lift a 10 kg mass
D)  the acceleration of a toy car over a 60 s period A

Question 2

On the surface of the Moon, a ball is thrown straight up with an initial velocity. The ball has a constant acceleration due to the Moon's gravity.On a graph of the ball's velocity versus time, which of the following would represent the ball at its highest point above the Moon's surface?

Accepted Answer

A)  when the velocity is equal to 0 m/s
B)  when the velocity is equal to 1.6 m/s
C)  when the velocity has its greatest value
D)  when the velocity has its most negative value A

Question 3

Which of the following increases when a metal spring is stretched horizontally?

Accepted Answer

A)  potential energy
B)  kinetic energy
C)  gravitational energy
D)  electrical energy A

Question 4

A window washer noticed that, from the same distance and with no breeze, the smell of ammonia glass cleaner reached him faster on a hot day (30°C) than on a cold day (5°C). Which of the following explains this observation?
A)Molecules expand at higher temperatures.
B)Molecules move more rapidly at higher temperatures.
C)The convection currents carry molecules at higher temperatures.
D)The chemical reaction of molecules increases at higher temperatures.

Accepted Answer

The answer of A window washer noticed that, from the...

Question 5

The molecules in which of the following have the greatest average molecular kinetic energy?

Accepted Answer

A)  air in a person's lungs
B)  ice cubes in a glass of iced tea
C)  raindrops collecting in a puddle
D)  water boiling in a pot on a stove

Question 6

A negatively charged rubber rod was brought near some small pieces of paper. The rod's charges repelled the negative charges in the pieces.Which of the following caused the repulsion of the negative charges?

Accepted Answer

A)  conduction
B)  gravitation
C)  induction
D)  insulation

Question 7

Which of the following properties determines a color in the visible light region of the electromagnetic spectrum?

Accepted Answer

A)  acceleration
B)  amplitude
C)  frequency
D)  speed

Question 8

Which of the following actions would increase the current through a circuit component?

Accepted Answer

A)  decreasing the power in the component
B)  increasing the resistance of the component
C)  increasing the voltage across the component
D)  placing another identical component in series in the circuit

Question 9

A copper sphere, a glass sphere, a plastic sphere, and a rubber sphere are placed on individual insulating stands. A student touches each sphere with an electrically charged object.The sphere made of which material will distribute the electric charge fastest over its entire surface area?

Accepted Answer

A)  copper
B)  glass
C)  plastic
D)  rubber

Question 10

Radio waves, visible light, and x-rays are examples of electromagnetic waves that always differ from each other in

Accepted Answer

A)  amplitude.
B)  intensity.
C)  temperature.
D)  wavelength.

Question 11

A student pushes a book across a classroom table. Which of the following statements best explains the difference between the amount of force needed to start the book moving and the amount of force needed to keep it moving?

Accepted Answer

A)  Less force is needed to start the book moving, because there is less friction than when it is already moving.
B)  Less force is needed to start the book moving, because there is less potential energy in the table than in the book.
C)  More force is needed to start the book moving, because there is more potential energy in the table than in the book.
D)  More force is needed to start the book moving, because there is more friction than when it is already moving.

Question 12

Which of the following can carry light waves but not sound waves?

Accepted Answer

A)  air
B)  steel
C)  water
D)  vacuum

Question 13

In a competition, weightlifter 1 lifts a 100 kg weight from the floor. Weightlifter 2 also lifts a 100 kg weight to the same height above the floor, but takes a longer time to do so.Which of the following statements describes the work done and the power used by the weightlifters?

Accepted Answer

A)  Weightlifter 2 does the same work and uses less power compared with weightlifter 1.
B)  Weightlifter 2 does less work and uses the same power compared with weightlifter 1.
C)  Weightlifter 2 does the same work and uses more power compared with weightlifter 1.
D)  Weightlifter 2 does more work and uses the same power compared with weightlifter 1.

Question 14

Perfume sprayed from a bottle spreads more easily in a warm room of 25°C than in a cool room of 15°C. Which of the following correctly compares perfume molecules at 25°C to those at 15°C?

Accepted Answer

A)  At 25°C, they have more mass.
B)  At 25°C, they are moving faster.
C)  At 25°C, they have less kinetic energy.
D)  At 25°C, they are decreasing in volume.

Question 15

Which of the following would be an advantage of using a 42 V battery in a car instead of a 12 V battery?

Accepted Answer

A)  It would allow carmakers to use fewer circuits.
B)  It would eliminate the use of generators and alternators.
C)  It would produce the same amount of power using less current.
D)  It would produce the same amount of power using more current.

Question 16

An astronaut drops a 1.0 kg object and a 5.0 kg object on the Moon. Both objects fall a total distance of 2.0 m vertically. Which of the following best describes the objects after they have fallen a distance of 1.0 m?

Accepted Answer

A)  They have each lost kinetic energy.
B)  They have each gained the same amount of potential energy.
C)  They have each lost the same amount of potential energy.
D)  They have each gained one-half of their maximum kinetic energy.

Question 17

Which of the following is an example of a nonharmonic motion?

Accepted Answer

A)  particles colliding with one another
B)  a pendulum swaying back and forth
C)  a child bouncing up and down on a large spring
D)  waves created on the surface of a glass of water during an earthquake

Question 18

Which of the following observations demonstrates that visible light waves are electromagnetic and not mechanical?

Accepted Answer

A)  Sunlight can pass through gas.
B)  Sunlight can pass through solids.
C)  Sunlight can pass through liquids.
D)  Sunlight can pass through a vacuum.

Question 19

The specific heat of wood is about 1,700 J/ kg• °C. How much energy is required to heat a 12 kg piece of wood from 20°C to 30°C?

Accepted Answer

A)  1,400 J
B)  17,000 J
C)  204,000 J
D)  612,000 J

Question 20

A large container of cold water is moved from a refrigerator to a table. A hot piece of metal is placed into the water. Which of the following best describes the final temperature of the metal?

Accepted Answer

A)  higher than the final temperature of the water
B)  the same as the final temperature of the water
C)  lower than the initial temperature of the water
D)  the same as the initial temperature of the water

Exam 32: (AP) Physics: Introductory Physics