Which of the following is true about soundwaves?

Question

Sound moves faster than the ocean than the air
Sound would move faster in a pool of rubber than in a pool of diamonds
Sound would move faster in a pool of water than in a pool of Jell-O
Sound moves faster in a lake than the ocean

Answer 1

The correct statement is:

Sound moves faster in a pool of water than in a pool of Jell-O.

Answer 2

A person moves away from a stationary sound source, which phrase describes the sound perceived by the person?
Lower pitch and longer wavelength
Lower pitch and shorter wavelength
Higher pitch and shorter wavelength
Higher pitch and longer wavelength

Answer 3

The correct phrase is:

Lower pitch and longer wavelength.