The change in entropy is Q/T for :

The change in entropy is Q/T for
 
  A) all processes.
  B) reversible processes.
  C) irreversible processes.
  D) all real engines.
  E) exothermic processes.

Question 2

Two Styrofoam balls, of radii R and 2R, are released simultaneously from a tall tower. Which will reach the ground first?
 
  A) The result will depend on the atmospheric pressure.
  B) the larger one
  C) Both will reach the ground simultaneously.
  D) the smaller one

Question 3

My 5.0 hp mower would be equivalent to an electric mower rated at what power?
 
  A) 2.8 W
  B) 0.25 KW
  C) 2.8 KW
  D) 3.7 KW
  E) 0.78 KW

Question 4

At the upper right of the HertzprungRussell diagram we find
 
  A) red giant stars
  B) supergiant stars
  C) white dwarfs
  D) main sequence stars

Question 5

The driver of a motorboat that can move at 10 m/s wishes to travel directly across a narrow strait in which the current flows at 5 m/s.
 
  (a) At what angle upstream should the driver head the boat?
  (b) How long will it take to cross a distance of 1.6 km?

Question 6

Sixty miles/hour is about how many meters/second?
 
  A) 96
  B) 112
  C) 1.6
  D) 27
  E) 37