Question 1

The stride of a horse depends somewhat on the pendulum-like swing of its legs.This stride would be higher in frequency if more of the mass in its legs were concentrated

Accepted Answer

A) in the upper part,nearer the horse's body. 
B) towards its feet. 
C) halfway up its legs. 
D) uniformly all along its legs. 
E) none of these 
A) in the upper part,nearer the horse's body. 
B) towards its feet. 
C) halfway up its legs. 
D) uniformly all along its legs. 
E) none of these A

Question 2

A node is a position of

Accepted Answer

A) minimum amplitude. 
B) maximum amplitude. 
C) half amplitude. 
A) minimum amplitude. 
B) maximum amplitude. 
C) half amplitude. A

Question 3

An object that completes 10 vibrations in 20 seconds has a frequency of

Accepted Answer

A) 0)5 hertz. 
B) 2 hertz. 
C) 200 hertz. 
A) 0)5 hertz. 
B) 2 hertz. 
C) 200 hertz. A

Question 4

A Doppler effect occurs when a source of sound moves

Accepted Answer

A) toward you. 
B) at right angles to you. 
C) both of these 
D) none of these 
A) toward you. 
B) at right angles to you. 
C) both of these 
D) none of these

Question 5

Use the following figure to answer the question:  
-How many vibrations per second are associated with a 101-MHz radio wave?

Accepted Answer

A) less than 101,000,000 
B) 101,000,000 
C) more than 101,000,000 
A) less than 101,000,000 
B) 101,000,000 
C) more than 101,000,000

Question 6

A wiggle in time is a

Accepted Answer

A) vibration. 
B) wave. 
C) both 
D) neither 
A) vibration. 
B) wave. 
C) both 
D) neither

Question 7

At a concert the oboe is playing a long steady note as you walk away from the stage at an accelerating velocity toward the rest room.The pitch of the sound that you hear is

Accepted Answer

A) steady but higher than normal. 
B) steady but lower than normal. 
C) continually decreasing. 
D) continually increasing. 
E) None of the above choices are correct. 
A) steady but higher than normal. 
B) steady but lower than normal. 
C) continually decreasing. 
D) continually increasing. 
E) None of the above choices are correct.

Question 8

A wave oscillates up and down two complete cycles each second.If the wave travels an average distance of 6 meters in one second,its wavelength is

Accepted Answer

A) 0)5 m. 
B) 1 m. 
C) 2 m. 
D) 3 m. 
E) 6 m. 
A) 0)5 m. 
B) 1 m. 
C) 2 m. 
D) 3 m. 
E) 6 m.

Question 9

A floating leaf oscillates up and down two complete cycles in one second as a water wave passes by.The wave's wavelength is 10 meters.What is the wave's speed?

Accepted Answer

A) 2 m/s 
B) 10 m/s 
C) 20 m/s 
D) 40 m/s 
E) more than 40 m/s 
A) 2 m/s 
B) 10 m/s 
C) 20 m/s 
D) 40 m/s 
E) more than 40 m/s

Question 10

A floating object oscillates up and down 2 complete cycles in 1 second as a water wave of wavelength 5 meters passes by.The speed of the wave is

Accepted Answer

A) 2 m/s. 
B) 5 m/s. 
C) 10 m/s. 
D) 15 m/s. 
E) none of these 
A) 2 m/s. 
B) 5 m/s. 
C) 10 m/s. 
D) 15 m/s. 
E) none of these

Question 11

The vibrations of a transverse wave move in a direction

Accepted Answer

A) along the direction of wave travel. 
B) at right angles to the direction of wave travel. 
C) that changes with speed. 
A) along the direction of wave travel. 
B) at right angles to the direction of wave travel. 
C) that changes with speed.

Question 12

Radio waves travel at the speed of light,300,000 km/s.The wavelength of a radio wave received at 100 megahertz is

Accepted Answer

A) 0)3 m. 
B) 3)0 m. 
C) 30 m. 
D) 300 m. 
E) none of these 
A) 0)3 m. 
B) 3)0 m. 
C) 30 m. 
D) 300 m. 
E) none of these

Question 13

Suppose a simple pendulum is suspended in an elevator.When the elevator is accelerating upward,the frequency of the pendulum

Accepted Answer

A) increases. 
B) decreases. 
C) doesn't change. 
A) increases. 
B) decreases. 
C) doesn't change.

Question 14

A Doppler effect occurs when a source of sound moves

Accepted Answer

A) towards you. 
B) away from you. 
C) either towards you or away from you. 
D) in a circle around you. 
A) towards you. 
B) away from you. 
C) either towards you or away from you. 
D) in a circle around you.

Question 15

Use the following figure to answer the question:  
-As a supersonic craft increases in speed,the angle of its V-shaped shock wave becomes

Accepted Answer

A) wider. 
B) narrower. 
C) neither 
A) wider. 
B) narrower. 
C) neither

Question 16

An aircraft that flies faster than the speed of sound is said to be

Accepted Answer

A) subsonic. 
B) supersonic. 
C) impossible. 
A) subsonic. 
B) supersonic. 
C) impossible.

Question 17

A fishing-boat captain returns to port saying,"It's rough out there - the waves are 4 meters high." He probably means that the amplitude of the waves is

Accepted Answer

A) 4 m. 
B) 3 m. 
C) 2 m. 
D) 1 m. 
A) 4 m. 
B) 3 m. 
C) 2 m. 
D) 1 m.

Question 18

The pendulum with the greatest frequency is the pendulum with the

Accepted Answer

A) shortest period. 
B) shortest length. 
C) shortest amplitude. 
D) greatest amplitude 
A) shortest period. 
B) shortest length. 
C) shortest amplitude. 
D) greatest amplitude

Question 19

The frequency of the second hand on a clock is

Accepted Answer

A) 1 hertz. 
B) 1/60 hertz. 
C) 60 hertz. 
A) 1 hertz. 
B) 1/60 hertz. 
C) 60 hertz.

Question 20

The sonic boom at ground level produced by an aircraft will be reduced if the aircraft

Accepted Answer

A) is smaller,flies higher,and is more streamlined. 
B) flies higher. 
C) is more streamlined. 
D) is smaller. 
E) None of the above choices are true. 
A) is smaller,flies higher,and is more streamlined. 
B) flies higher. 
C) is more streamlined. 
D) is smaller. 
E) None of the above choices are true.

Exam 19: Vibrations and Waves

The stride of a horse depends somewhat on the pendulum-like swing of its legs.This stride would be higher in frequency if more of the mass in its legs were concentrated

A node is a position of

An object that completes 10 vibrations in 20 seconds has a frequency of

A Doppler effect occurs when a source of sound moves

Use the following figure to answer the question: -How many vibrations per second are associated with a 101-MHz radio wave?

A wiggle in time is a

At a concert the oboe is playing a long steady note as you walk away from the stage at an accelerating velocity toward the rest room.The pitch of the sound that you hear is

A wave oscillates up and down two complete cycles each second.If the wave travels an average distance of 6 meters in one second,its wavelength is

A floating leaf oscillates up and down two complete cycles in one second as a water wave passes by.The wave's wavelength is 10 meters.What is the wave's speed?

A floating object oscillates up and down 2 complete cycles in 1 second as a water wave of wavelength 5 meters passes by.The speed of the wave is

The vibrations of a transverse wave move in a direction

Radio waves travel at the speed of light,300,000 km/s.The wavelength of a radio wave received at 100 megahertz is

Suppose a simple pendulum is suspended in an elevator.When the elevator is accelerating upward,the frequency of the pendulum

A Doppler effect occurs when a source of sound moves

Use the following figure to answer the question: -As a supersonic craft increases in speed,the angle of its V-shaped shock wave becomes

An aircraft that flies faster than the speed of sound is said to be

A fishing-boat captain returns to port saying,"It's rough out there - the waves are 4 meters high." He probably means that the amplitude of the waves is

The pendulum with the greatest frequency is the pendulum with the

The frequency of the second hand on a clock is

The sonic boom at ground level produced by an aircraft will be reduced if the aircraft

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