Question

1. The speed of sound through a gas will increase if the following is also increased:

A. the temperature of the gas
B. density of the gas
C. compressibility of the gas
D. index of refraction of the gas.

2. A rainbow is formed because when white light passes through raindrops, the white light is

A. absorbed the raindrops
B. reflected by the air
C. refracted by the raindrops
D. unaffected

Answer 1

1. The speed of sound in gas is directly proportional to sqrt of Temperature. Hence The speed of sound through a gas will increase if the temperature of the gas is increased. 2. When white light passes through rain drops, it breaks into different colors due to refraction. Hence A rainbow is formed because when white light passes through raindrops, the white light is refracted by the raindrops