You are able to hear sounds from farther away on a cool night because sound waves are refracted toward
A) cooler air near the ground.
B) warmer air above the ground.
C) cooler air above the ground.
D) warmer air near the ground.
Correct Answer:
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Q18: The restoring force of a spring is
Q19: Transverse mechanical waves can pass through
A)solids.
B)liquids.
C)gases.
D)All of
Q20: Piano tuners listen to the beat frequency
Q21: A sound that is perceived as twice
Q22: When the trough of one wave arrives
Q24: A noise level of 65 decibels is
Q25: The lowest frequency possible in a vibrating
Q26: What is the range of normal human
Q27: Condensation in a longitudinal wave corresponds to
Q28: Resonance occurs at a (an)
A)natural frequency.
B)intensity match.
C)point
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