Why does sound travel rapidly though the lower well-mixed surface ...

[chads108]

Why does sound travel rapidly though the lower well-mixed surface layer?
  a. Temperature and pressure are homogeneous
  b. Temperature and salinity are homogeneous
  c. It produces high refraction areas
  d. Density is heterogeneous

Question 2

What is true of heat capacity?
  a. It is the measure of an object's response to an input of heat.
  b. It is the measure of heat required to raise the temperature of one gram by 1 Celsius.
  c. It is the measure of energy produced by random vibrations of atoms or molecules.
  d. It is a consistent amount across various substances

[Ptupou85]

Answer to Question 1

ANS: B
The temperature and salinity is consistent throughout this layer. With the pressure increasing with
depth, a thin, high-velocity layer is formed above the pycnocline. Information can be found in the
section Sound Travels Much Farther Than Light through the Ocean

Answer to Question 2

ANS: B
The heat capacity of a substance is the amount of heat needed to raise the temperature of one gram by
one degree Celsius. Heat capacity changes for each substance and is measured in calories per gram.
Information can be found in the section Water Has Unusual Thermal Characteristics