AFNS — AFNS Physics
Waves
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#25 Doppler effect:
A) Frequency shift due to motion
B) No change
C) Only light
D) Only solids
Answer: A
#26 Sound cannot travel in:
A) Vacuum
B) Air
C) Water
D) Steel
Answer: A
#27 Speed of sound in air about:
A) 340 m/s
B) 3x10^8
C) 1500 m/s
D) 5000 m/s
Answer: A
#28 Pitch of sound relates to:
A) Frequency
B) Amplitude
C) Speed in vacuum
D) Mass
Answer: A
#29 Loudness relates to:
A) Amplitude
B) Frequency
C) Wavelength only
D) Period only
Answer: A
#30 Ultrasound frequency:
A) Above human hearing
B) Below hearing
C) Exactly 440 Hz
D) Zero Hz
Answer: A
#31 Echo is:
A) Reflected sound
B) Refracted light
C) Diffracted X-ray
D) Polarized wave
Answer: A
#32 Stationary wave formed by:
A) Superposition of opposite waves
B) Single pulse
C) Only transverse
D) Only longitudinal forbidden
Answer: A
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