Two identical fish, both at sea level, float in two identical aquariums with identical quantities of water. Fish A is in Alaska, so it weighs more than fish B at the equator, since g is larger at sea level in Alaska. Which statement is correct?
a. A comparison is impossible unless they are both floating at the same level.
b. Fish A displaces a greater quantity of water than fish B.
c. Fish B displaces a greater quantity of water than fish A.
d. They both displace the same quantity of water.
e. Fish A has a smaller acceleration than Fish B when equal horizontal forces are applied to each, because Fish A weighs more.
D
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If the Moon is relatively far from Earth, so that its umbra does not reach Earth, someone directly behind the umbra will see
A) a penumbral lunar eclipse. B) a partial solar eclipse. C) no eclipse. D) an annular eclipse. E) a partial lunar eclipse.
Suppose that an object’s entropy increases from zero when its thermal energy is U = 0 to some maximum value when U = 
Umax, and then goes back to zero when U = Umax (as shown in the drawing below). The greatest thermal energy U that such an object could have when in thermal equilibrium with a normal object is closest to which of the following?
A. 0
B. 
Umax
C. 
Umax
D. 
Umax
E. Umax
F. Other (specify)
You have observed the wobble in the velocity curves of two otherwise identical stars. Star A has a period of 6 months and Star B has a period of 1 year. What can you say about these stars?
A) It is impossible to say anything about the planets orbiting these stars. B) Star B must have a planet like Earth. C) Star A's planet must be closer than Star B's planet. D) Star A's planet is more massive than Star B's planet.
Of the five rock-forming mineral groups—the silicates, carbonates, oxides, sulfides, and sulfates—which two form economically important ores?
A) silicates and carbonates B) carbonates and oxides C) oxides and sulfides D) sulfides and sulfates