1) A wiggle in time is a |
A) vibration. |
2) A fishing-boat captain returns to port saying, "It’s rough out there – the waves are 4 meters high." He |
C) 2 m. |
3) The amplitude of a particular wave is 1 meter. The top-to-bottom distance of the disturbance is |
C) 2 m. |
4) How many vibrations per second are associated with a 101-MHz radio wave? |
B) 101,000,000 |
5) If you double the frequency of a vibrating object, its period |
B) halves. |
6) The pendulum with the greatest frequency is the pendulum with the |
A) shortest period. |
7) A floating leaf oscillates up and down two complete cycles each second as a water wave passes by. |
C) 2 hertz |
8) A 60-vibration-per-second wave travels 30 meters in 1 second. Its frequency is |
B) 60 hertz and it travels at 30 m/s. |
9) An object that completes 10 vibrations in 20 seconds has a frequency of |
A) 0.5 hertz. |
10) An object that completes 20 vibrations in 10 seconds has a frequency of |
C) 2 hertz. |
11) An object that completes 100 vibrations in 5 seconds has a period of |
D) None of the above choices are correct. |
12) A weight suspended from a spring bobs up and down over a distance of 1 meter in two seconds. Its |
A) 0.5 hertz. |
13) If the frequency of a certain wave is 10 hertz, its period is |
A) 0.1 second. |
14) A common source of wave motion is a |
C) vibrating object. |
15) As a train of water waves goes by, a piece of cork floating on the water bobs up and down one |
D) 2 m/s |
16) A skipper on a boat notices wave crests passing the anchor chain every 5 seconds. The skipper |
A) 3 m/s |
17) Radio waves travel at the speed of light, 300,000 km/s. The wavelength of a radio wave received at |
B) 3.0 m. |
18) A floating leaf oscillates up and down two complete cycles in one second as a water wave passes by. |
C) 20 m/s |
19) A floating object oscillates up and down 2 complete cycles in 1 second as a water wave of |
C) 10 m/s. |
20) A wave oscillates up and down two complete cycles each second. If the wave travels an average |
D) 3 m. |
21) Like a transverse wave, a longitudinal wave has |
A) amplitude, frequency, wavelength, and speed. |
22) Which of the following is not a transverse wave? |
A) sound |
23) The vibrations of a transverse wave move in a direction |
B) at right angles to the direction of wave travel. |
24) In a longitudinal wave the compression and rarefaction travel in |
A) the same direction. |
25) The vibrations of a longitudinal wave move in a direction |
A) along the direction of wave travel. |
26) Wave interference occurs for |
D) All of the above choices are correct. |
27) To say that one wave is out of phase with another is to say that the waves are |
D) out of step. |
28) A standing wave occurs when |
B) a wave reflects upon itself. |
29) A node is a position of |
A) minimum amplitude. |
30) A Doppler effect occurs when a source of sound moves |
C) either towards you or away from you. |
31) The Doppler effect is characteristic of |
D) all of the above choices |
32) A wave barrier is produced when a wave source moves |
B) as fast as the waves it produces. |
33) A bow wave is produced when a wave source moves |
B) as fast as the waves it produces. |
34) An observer on the ground hears a sonic boom which is created by an airplane flying at a speed |
C) greater than the speed of sound. |
35) An aircraft that flies faster than the speed of sound is said to be |
B) supersonic. |
36) As a supersonic craft increases in speed, the angle of its V-shaped shock wave becomes |
B) narrower. |
37) The sonic boom at ground level produced by an aircraft will be reduced if the aircraft |
A) is smaller, flies higher, and is more streamlined. |
38) A jet traveling at 1500 km/hr passes between observers A and B. In a short time a sonic boom will |
D) observers A and B, but not the pilot. |
Physics Chapter 19
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