Mercury presents the same side to the Sun
A) all the time, just like our Moon.
B) every 12 hours.
C) twice every orbit.
D) every other orbit.
E) every third orbit.
D
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How much stronger is the gravitational pull of the Sun on Earth, at 1 AU, than it is on Saturn at 10 AU?
A) 5X B) 10X C) 25X D) 100X E) 250X
Which force binds atoms together to form molecules?
A) gravitational B) nuclear C) electric D) centripetal E) none of the above
A jogger runs halfway around a circular path with a radius of 60.0 m. What, respectively, are the magnitude of the displacement and the distance jogged?
a. 60.0 m, 188 m b. 120 m, 188 m c. 0 m, 377 m d. 120 m, 377 m e. 60.0 m, 377 m
A 0.20-km wide river has a uniform flow speed of 4.0 m/s toward the east. It takes 20 s for a boat to cross the river to a point directly north of its departure point on the south bank. In what direction must the boat be pointed in order to accomplish this?
a. 23° west of north b. 20° west of north c. 24° west of north d. 22° west of north e. 17° west of north