How old is Earth, according to the vast majority of scientists?
A) a few thousand years
B) about 100 billion years
C) a few billion years
D) about a billion years
E) a few million years
C
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Europa has few craters because
a. it is protected from impacts by Jupiter's gravity. b. it does not have a solid surface. c. it has erased craters nearly as fast as they have formed. d. its surface is not strong enough to support craters. e. it keeps one face always pointed toward Jupiter which screens it from incoming meteorites.
A car traveling at 3.0 m/s has a constant acceleration of 4.0 m/s2 . After 2.0 seconds, the velocity is
A. 5.0 m/s. B. 7.0 m/s. C. 9.0 m/s. D. 11 m/s. E. 13 m/s.
The Northern Hemisphere is warmer in its summer months because ________.
A. Earth is closer to the Sun during this time and the Sun is in the sky for a longer period of time B. Earth is closer to the Sun during this time C. the Sun is in the sky for a longer period of time and the Sun is more directly overhead during this time D. the Sun is more directly overhead during this time E. the Sun is in the sky for a longer period of time
A long cylindrical shell (radius = 2.0 cm) has a charge uniformly distributed on its surface. If the magnitude of the electric field at a point 8.0 cm radially outward from the axis of the shell is 85 N/C, how much charge is distributed on a 2.0-m length of the charged cylindrical surface?
A. 0.38 nC B. 0.76 nC C. 0.19 nC D. 0.57 nC E. 0.98 nC