Which of the partition functions below yields an average energy Eavg that is NOT an integer multiple of 
in the high-temperature (small-?) limit? Assume that ? is a constant with units of energy, and ? = 1/kBT.
A. Z = (2?/??)2
B. Z = (??)?1/2
C. Z = (1 ? e??? )?1 (note that ex ? 1 + x when 
<< 1)
D. None of the above.
E. All of the above.
D. None of the above.
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A white dwarf whose red giant companion dumps hydrogen onto it may
a. show no effect. b. explode recurrently as a nova. c. blow up as a type I supernova. d. explode recurrently as a nova or blow up as a type Ia supernova.
What would the surface temperature be in this example if the greenhouse effect simply increased the surface temperature by the same number of degrees that it does today? Express your answer in degrees Celsius to three significant figures.
2.20 kilograms of water at 1.00 atm at the boiling point of 100°C is heated until all the water vaporizes. What is its change in entropy? (For water, Lv = 2.26 × 10^6 J/kg)
a. 2.67E+4 J/K b. 1.33E+4 J/K c. 6.66E+3 J/K d. 4.44E+3 J/K e. 1.82E+4 J/K
Why is the core hot?
A. from both the decay of radioactive atoms and the leftover heat B. from heat left over from the planet's birth C. The high pressure in the core drives the temperature higher. D. from the steady decay of radioactive atoms in the rock E. None of these choices are correct.