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1. What are the factors that affect the speed of sound in gases?
a. In a gas, the square root of the density is inversely proportional to the .
b.The ___________ of a gas's temperature determines the velocity of sound in that gas .
c.The speed of sound increases as humidity .
d.The velocity of sound in a gas increases as the temperature rises .
2. What is mean by reflection of sound? Explain:
a. reflection at the boundary of a rarer medium
b. reflection at the boundary of a denser medium
c. Reflection at curved surfaces
a. A __________ occurs at the contact because the particles of the rarer medium are free to move .
b. The and of a longitudinal wave move through a medium
c. The changes as sound waves are reflected from curved surfaces
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