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Sound
Test Description: 26.6-26.8
Instructions: Answer all questions to get your test result.
1) Almost everything has a natural frequency
A
False
B
True
2) Resonance occurs when
A
an object is forced to vibrate at its natural frequency
B
sound changes speed when going from one medium to another
C
sound reflects
D
the sound wave is amplified
3) When an object is made to vibrate by another vibrating object that is nearby
A
interference
B
natural frequency
C
resonance
D
forced vibration
4) Even a steel bridge can collapse due to resonance.
A
False
B
True
5) If an acoustic guitar did not have a sounding board (no hole in its body), the guitar would
A
sound the same a usual
B
make little sounds that you could barely hear
C
make no sound at all
6) You drop a baseball/softball bat on the ground. The sound produced is
A
vibrating at the bat's natural frquency
B
in resonance
C
a forced vibration
7) A singer shattering a glass with her voice is a demonstration of
A
resonance
B
interference
C
beats
D
an echo
8) When a sound wave is resonating the sound produced will be
A
no change in sound
B
softer
C
louder
9) Waves produced during resonance have a(n) ______________ amplitude.
A
higher
B
lower
C
unchanged
10) Tacoma Narrows bridge collapsed due to
A
beats
B
constructive interference
C
destructive interference
D
resonance
*select an answer for all questions
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