Chapter 19 Vibrations and Waves

An object that completes 10 vibrations in 20 seconds has a frequency of A. 0.5 hertz B. 2 hertz C. 200 hertz

A. 0.5 hertz

The vibrations of a longitudinal wave move 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

If you quickly run away form the orchestra at a concert, the frequency of the sound you will hear will be A. decreased B. increased C. neither of these

A. decreased

In the Doppler effect it is important to distinguish between A. frequency and speed B. speed and velocity C. speed and acceleration D. distance and displacement

A. frequency and speed

The frequency of a simple pendulum does NOT depend on A. its mass B. its length C. the acceleration due to gravity D. all of the above E. none of the above

A. its mass

A node is a position of A) minimum amplitude. B) maximum amplitude. C) half amplitude.

A. minimum amplitude

Repeatedly dipping your fingers into water produces waves. Increasing the frequency of dipping produces waves that are A. shorter B. longer C. the same

A. shorter

The source of all waves is A. something that vibrates B. energy C. a force of some kind D. all of the above E. none of the above

A. something that vibrates

A blue shift for light indicates that the light source is moving A. towards you B. away from you C. either of these D. neither of these

A. towards you

A fishing-boat captain returns to port saying, "It's rough out there with waves that are 4 meters high." He is probably talking of waves of amplitude A. 1 m B. 2 m C. 3 m D. 4 m

B. 2 m

Radio waves travel at the speed of light, 300,000 km/s. The wavelength of a radio wave received at 100 megahertz is A. 0.3 m B 3 m C. 30 m D. 300 m C. none of the above

B. 3 m

A 60-vibration-per-second wave travels 30 meters in 1 second. Its frequency is A. 30 hertz and it travels at 60 m/s B. 60 hertz and it travels at 30 m/s C. 1800 hertz and it travels at 2 m/s D. none of the above

B. 60 hertz and it travels at 30 m/s

If you quickly run toward the orchestra at a concert, the frequency of the sound you will hear will be A. decreased B. increased C. neither of these

B. Increased

A standing wave is likely produced when A. two waves overlap B. a wave reflects upon itself C. the speed of the wave is zero or near zero D. the amplitude of a wave exceeds its wavelength

B. a wave reflects upon itself

The vibrations of a transverse wave move A. along the direction of wave travel B. at right angles to the direction of wave travel C. that changes with speed

B. at right angles to the direction of the wave travel

A redshift for light indicates that the light source is moving A. towards you B. away from you C. either of these D. neither of these

B. away from you

If you double the frequency of a vibrating object, its period A. doubles B. halves C. is quartered

B. halves

Wave interference occurs for A. sound waves B. light waves C. water waves D. all of the above E. none of the above

B. light waves

The pendulum with the greatest frequency is one with the A. shortest length B. longest length C. neither

B. longest length

The distance traveled by a wave during a single period is A. one-half wavelength B. one wavelength C. two wavelengths D. none of the above

B. one wavelength

If a child swinging to and fro on a playground swing stands up, her time for a to-and-fro swing is A. longer B. shorter C. unchanged

B. shorter

An aircraft that flies faster than the speed of sound is said to be A. subsonic B. supersonic C. impossible D. none of the above

B. supersonic

All waves have in common a A. pattern B. vibrating source C. variable regions of high and low pressure D. None of the above

B. vibrating source

A wiggle in both space and time is a A. Vibration B. Wave C. both D. neither

B. wave

The frequency of a certain wave is 10 hertz and its period is A. 0.1 seconds B. 10 seconds C. 100 seconds D. none of the above

C. 100 seconds

A water wave passes by a floating leaf that is made to oscillate up and down two complete cycles each second, which means that the wave's frequency is A. 0.5 Hz B. 1 Hz C. 2 Hz D. 3 Hz E. 6 Hz

C. 2 Hz

An object that completes 20 vibrations in 10 seconds has a frequency of A. 0.5 hertz B. 1 hertz C. 2 hertz D. 200 hertz

C. 2 hertz

The amplitude of a wave is 1 meter. The crest-to-trough distance of the wave is A. 0.5 m B. 1 m C. 2 m D. none of the above

C. 2 m

A floating leaf oscillates up and down two complete cycles in one second as a 10-meter long water wave passes by. What is the wave's speed? A. 2 m/s B. 10 m/s C. 20 m/s D. 40 m/s E. more than 40 m/s

C. 20 m/s

Some of a wave's energy dissipates as heat. In time, this will reduce the wave's A. speed B. wavelength C. amplitude D. frequency E. period

C. amplitude

Which equation is correct for wave speed? A. wave speed = frequency x wavelength B. wave speed = (1/period) x wavelength C. both of these D. neither of these

C. both of these

A Doppler effect occurs when a source of sound moves A. towards you B. away from you C. either of these D. neither of these

C. either of these

A bow wave is produced when a speed boat moves A. nearly as fast as the waves it produces B. as fast as the waves it produces C. faster than the wave it produces D. none of the above

C. faster than the wave it produces

A shock wave is produced when a wave source moves A. nearly as fast as the waves it produces B. as fast as the waves it produces C. faster than the wave it produces D. none of the above

C. faster than the waves it produces

A sonic boom is produced by an airplane flying at a speed A just below the speed of sound B. equal to the speed of sound C. greater than the speed of sound D. all of the above E. none of the above

C. greater than the speed of sound

What is the wave speed of a wave traveling an average distance of 6 meters in one second? A. less that 0.2 m/s B. 1 m/s C. 3 m/s D. 6 m/s E. more than 6 m/s

D. 6 m/s

Interference is property of A. sound waves B. water waves C. light waves D. all of the above E. none of the above

D. all of the above

The Doppler effect is characteristic of A. water waves B. sound waves C. light waves D. all of the above E. none of the above

D. all of the above

Which of these is a longitudinal wave? A. sound B. light C. radio D. all of the above E. none of the above

D. all of the above

To say that one wave is out of phase with another is to say that the waves are A. of different amplitudes B. of different frequencies C. of different wavelengths D. out of step E. all of the above

D. out of step

Both a transverse wave and a longitudinal wave have A. amplitude B. frequency C. wavelength D. speed E. all of the above

E. all of the above

The number of nodes, including the endpoints, in a standing wave that is two wavelengths long, is A. 1 B. 2 C. 3 D. 4 E. none of the above

E. none of the above

A weight suspended from a spring bobs up and down over a distance of 1 meter in two seconds. Its frequency is A. 0.5 hertz B. 1 hertz C. 2 hertz D. none of the above

A. 0.5 hertz

A wiggle in time is a A) vibration. B) wave. C) both D) neither

A. Vibration

A 101-MHz radio wave has vibrations per second of A. less than 101,000,000 B. 101,000,000 C. more than 101,000,000

B. 101,000,000

The number of nodes, including the endpoints, in a standing wave that is three wavelengths long, is A. 4 B. 5 C. 6 D. 7 E. none of the above

D. 7