The internal energy of an ideal gas is changed by adding heat Q ...

[tsand2]

The internal energy of an ideal gas is changed by adding heat Q to the system and also by doing work W on the gas. What is the change in internal energy of the gas?
 
  A)
 
  4.186Q - W
 
  B)
 
  Q - 4.186W
 
  C)
 
  W - Q
 
  D)
 
  Q + W
 
  E)
 
  Q - W

Question 2

An electromagnetic wave with components Ey = Eo sin(kx - t) and Bz = Bo sin(kx - t) is a wave traveling in the
 
  A)
 
  negative x-direction.
  B)
 
  x-direction.
  C)
 
  y-direction.
  D)
 
  z-direction.
  E)
 
  cannot be determined with the information given

[Ddddd]

Answer to Question 1

D

Answer to Question 2

B