The Moon always presents the same face to Earth because
a. the Moon does not rotate on its axis.
b. the Moon rotates on its axis at same rate at which it revolves around Earth.
c. the Moon revolves around the Sun in one month.
d. none of these
b
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If your worldline is following the straightest possible path through spacetime, then
A) you will be weightless. B) you will feel heavier than your normal weight. C) you must be accelerating. D) you must be traveling at constant velocity.
A non-foliated metamorphic rock is
A) slate. B) schist. C) gneiss. D) quartzite.
When space probe Voyager 2 passed by Saturn, its speed increased (but not due to firing its engines). What must have happened?
A) Voyager 2 must have dipped through Saturn's atmosphere. B) Saturn's rotation must have sped up slightly. C) Saturn must have lost a very tiny bit of its orbital energy. D) Saturn must have captured an asteroid at precisely the moment that Voyager 2 passed by.
3 steps on the Richter scale represents about how many times more energy?
a. 32 b. 32000 c. 30000 d. 300