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

Physics & Space Science

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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)

Physics & Space Science

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.

Physics & Space Science

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.

Physics & Space Science

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

Physics & Space Science