Which of the following best explains why an interstellar ramjet could, in theory, achieve continuous acceleration?
A) It takes advantage of theoretically possible loopholes in Einstein's theory of relativity.
B) It uses fuel that is more efficient than any other known fuel.
C) It collects its fuel as it goes, rather than having to carry the weight of fuel along with it.
D) It has such a large fuel tank that it will essentially never use up all the fuel it carries.
E) Its speed always gets faster because time dilation changes the rate at which time flows.
C
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Tidal heating is not important for which of the following Galilean moons?
A) Callisto B) Io C) Europa D) Ganymede
The vibrating system with the greatest frequency has the
A) shortest period. B) longest period. C) both of these D) none of the above
If ? = 4, which one of the following is a possible quantum number for n?
A) 0 B) 2 C) 3 D) 4 E) 8