What effect does temperature and pressure have on the speed of ...

[bclement10]

What effect does temperature and pressure have on the speed of sound when entering seawater?
  a. The speed of sound increases as temperature and pressure decreases.
  b. The speed of sound increases with temperature increases, but decreases with pressure.
  c. The speed of sound decreases as temperature and pressure decrease.
  d. The speed of sound is impacted by pressure but not temperature.

Question 2

What is a shadow zone?
  a. A zone that is unable to be penetrated by sound waves due to the density of seawater.
  b. A zone that is unable to be penetrated by light waves due to deep depths.
  c. A zone created in front of ships and submarines that creates a converging blind spot for
  sound waves.
  d. A zone where the divergence of sound waves creates a region that has little sound energy
  penetration

[cam1229]

Answer to Question 1

ANS: C
The speed of sound has a direct correlation with temperature and pressure. Sound travels faster in
warm surface waters than in deeper, cold waters. After the sound reaches a minimum level, the speed
of sound begins to increase again. Information can be found in the section Sound Travels Much
Farther Than Light through the Ocean

Answer to Question 2

ANS: D
These shadow zones are areas have very little sound energy penetration. They are used by submariners
and the ships that are hunting them. Information can be found in the section Sound Travels Much
Farther Than Light through the Ocean.

[bclement10]

TY

[cam1229]

You're welcome