PHYSICS 101, Fall 2004. Third multiple choice quiz (parts 2 and 3) ZEUS FORM: You MUST bubble in the following information on your Zeus form exactly, or your test will not be graded!!!"Course Sort Number:: 14583 "Test ID Form AA Test ID NO." 03, and you must bubble in the LAST 5 digits of your SS# (student #) in the format 0000####, where the #'s represent the last five digits of your SS #. Of course, you are to also bubble in your name. Save this sheet!!

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

  1. Sue's refrigerator is built into the wall of her kitchen, so that it exhausts heat to the outdoors rather than into the room. If Sue tries to cool her kitchen by leaving the refrigerator door open, the room temperature will A) increase at least slightly. B) decrease at least slightly. C) remain unchanged.
  2. The ideal efficiency for a heat engine operating between temperatures of 2700 K and 300 K is
    A) 10%. B) 24%. C) 80%. D) 89%. E) none of these.
  3. When work is done by a system and no heat added to it, the temperature of the system
    A) increases. B) decreases. C) remains unchanged.
  4. One hundred joules of heat is added to a system that performs 60 joules of work. The internal energy change of the system is A) 0 J. B) 40 J. C) 60 J. D) 100 J. E) none of these.
  5. The greater the difference in temperature between the input reservoir and the output reservoir for a heat engine, the A) greater the efficiency. B) less the efficiency. C) neither, efficiency doesn't depend on temperature difference.
  6. The lowest temperature possible in nature is A) 0 degrees C. B) -273 degrees C. C) 4 K. D) none of these.
  7. The first law of thermodynamics is a restatement of the : A) principle of entropy. B) law of heat addition. C) Carnot cycle. D) conservation of energy. E) none of these.
  8. Entropy measures A) temperature at constant pressure. B) temperature at constant volume. C) temperature as pressure increases. D) temperature as volume increases. E) messiness.
  9. The reason a granite block is mostly empty space is that the atoms in the granite are A) in perpetual motion. B) mostly empty space themselves. C) held together by electrical forces. D) not as close together as they could be. E) invisible.
  10. Which of these atoms has the greatest number of electrons? A) helium B) carbon C) iron D) gold E) uranium
  11. Which has more skin compared to its body weight, an elephant or a mouse? A) elephant B) mouse C) typically, both the same
  12. If the volume of an object were to double while its mass stays the same, its density would A) halve. B)  double. C)  stay the same.
  13. When a boat sails from fresh water to salt water, the boat will float A) lower in the water. B) higher in the water. C) at the same water level.
  14. Water pressure is greatest against the A) top of a submerged object. B) bottom of a submerged object. C) sides of a submerged object. D) is the same against all surfaces. E) none of these.
  15. A suction cup sticks to a wall. It is A) pulled to the wall by the vacuum. B) pushed to the wall by the atmosphere. C) both of these. D) neither of these.
  16. When water at 4 degrees C is heated it expands. When water at 4 degrees C is cooled, it A) contracts. B) expands. C) neither contracts nor expands.
  17. When you touch a cold piece of ice with your finger, energy flows A) from your finger to the ice. B) from the ice to your finger. C) actually, both ways.
  18. When steam condenses to water, it is a A) cooling process B) heating process C) neither causes heating nor cooling.
  19. The greater the difference in temperature between the input reservoir and the output reservoir for a heat engine, the A) greater the efficiency. B) less the efficiency. C) neither, efficiency doesn't depend on temperature difference.
  20. When a volume of air is compressed and no heat enters or leaves, the air temperature will A) increase. B) decrease. C) remain unchanged.