When air rapidly expands, its temperature will 1) decrease, ...

[skymedlock]

When air rapidly expands, its temperature will
 
  1) decrease,
  2) increase,
  3) stay the same,
 
  whereas when air is rapidly compressed, its temperature will
  4) decrease.
  5) increase.
  6) stay the same.

Question 2

When water at 4C is heated, it expands. When water at 4C is cooled, it
 
  1) contracts,
  2) expands,
  3) neither contracts nor expands,
  4) not enough information given,
 
  which follows from the fact that
  5) cooling decreases the kinetic energy of H2O molecules.
  6) water has its greatest density at 4C.
  7) we do not know how the water is cooled.

[lcapri7]

Answer to Question 1

Answer: 1, 5

Answer to Question 2

Answer: 2, 6

[skymedlock]

Excellent

[blakcmamba]

Gracias!