It is believed that there was a heavy bombardment of planetesimals at what stage in planetary development?
a. cratering
b. flooding
c. slow surface evolution
d. plate tectonics
e. differentiation
a
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Why are there no impact craters on the surface of Io?
A) Io is too small to have experienced many impacts. B) Jupiter's strong gravity prevents impacts from hitting Io. C) All of Io's impact craters have been buried by lava flows. D) Any impact craters that once existed on Io were eroded by winds and rain. E) Io formed only recently, long after the heavy bombardment ended.
A Hooke's law spring is compressed 12.0 cm from equilibrium and the potential energy stored is 52.0 J. What is the spring constant in this case?
a. 7 220 N/m b. 3 610 N/m c. 72.2 N/m d. 0.722 N/m e. No answer is correct.
The energy level diagram for hydrogen
The energy of the most energetically possible photon emitted is __________.
The image formed by a concave mirror when the object is placed between the mirror and the focal point has the following characteristics:
A) virtual, upright, enlarged, image distance is larger than object distance B) virtual, upright, reduced, image distance is smaller than object distance C) real, inverted, enlarged, image distance is larger than object distance D) real, upright, enlarged, image distance is larger than object distance E) virtual, inverted, reduced, image distance is smaller than object distance