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Sound Part 2
Test Description: Other topics
Instructions: Answer all questions to get your test result.
1) What is characteristic of the Doppler effect?
A
the bending of waves due to a change in the speed of the medium
B
apparent increase in frequency when the source is approaching an observer
C
the ability of waves to bend past small obstacles and go through small holes
D
synonymous to the law of superposition
2) What is an incident pulse?
A
Follows a change in direction of wave
B
All of the above
C
Original disturbance that encounters the boundary or obstacle within the medium
D
Happens during reflection of waves
3) What happens during in reflection from a hard boundary?
A
Leftover energy causes the wave to bounce off the pole and continue traveling in the opposite direct
B
All of the above
C
Reflected wave is inverted
D
a small amount of energy is transferred to the pole, thus causing the pole to vibrate
4) What happens during reflection from a soft boundary?
A
Velocity changes direction
B
Reflected wave is inverted
C
the wave does not transfer energy to the pole
D
Wavelength changes direction
5) Is the levitation of water possible?
A
It is merely a trick of the camera
B
No, THERE ARE NO WATERBENDERS
C
No, the video has been altered
D
Yes, the water does take the certain forms
6) What is a principle of diffraction?
A
A and B only
B
Sound is distorted when traveling large distances
C
Observed in a change in direction of waves as they are passing through an opening or barrier
D
Sound will bend around certain small obstacles and spread out past openings
7) Which way will sound refract during a temperature lapse(air warmest close to ground)?
A
Downwards
B
Not at all
C
Straight
D
Upwards
8) Which way will sound refract during a temperature inversion?
A
Upwards
B
Downwards
C
Not at all
D
Straight
9) How do we perceive music?
A
As sound particles that can be decoded
B
a mixture of sound waves that have different frequencies
C
as a series of random noises
D
a mixture of frequencies that do not have an obvious mathematical relationship and no pattern
10) what is not a characteristic of a beat
A
two waves of similar frequencies interfere with one another
B
a fast tempo being taken by the musician
C
periodic and repeating fluctuations
D
amplitude is changing at a regular rate
*select an answer for all questions
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