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Waves
Test Description: 25.10-25.11
Instructions: Answer all questions to get your test result.
1) Bow waves form when the wave source moves faster than the wave speed.
A
False
B
True
2) What shape of wake does a bow wave make in back of a moving object.
A
U
B
V
C
W
D
M
3) While jet-skiing on a lake you look back and notice a v-shaped pattern made by overlapping wave crests. This pattern is known as a
A
transverse wave
B
shock wave.
C
bow wave
D
v wave
4) If the speed of a the source is increased in a bow wave, the shape of the bow wave will be
A
no change
B
narrower
C
broader
5) A shock wave forms when an object moves faster than the speed of sound.
A
True
B
False
6) A shock wave has the shape of a
A
cone
B
parallelogram
C
triangle
D
sphere
7) A sonic boom is formed only at the moment an object breaks through the sound barrier.
A
True
B
False
8) An aircraft that flies faster than the speed of sound is said to be
A
semisonic.
B
supersonic.
C
subsonic.
D
ultrasonic.
9) A sonic boom is
A
swept continuously behind a plane flying faster than the speed of sound.
B
produced by subsonic projectiles as well as subsonic aircraft.
C
produced as a plane breaks through the sound barrier.
10) An observer on the ground hears a sonic boom that is created by an airplane flying at a speed
A
just below the speed of sound.
B
greater than the speed of sound.
C
equal to the speed of sound.
*select an answer for all questions
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