A block is pushed across a rough horizontal surface from point A to point B by a force (magnitude P = 5.4 N) as shown in the figure. The magnitude of the force of friction acting on the block between A and B is 1.2 N and points A and B are 0.5 m apart. If the kinetic energies of the block at A and B are 4.0 J and 5.6 J, respectively, how much work is done on the block by the force
P between A and B?
a.
2.7 J
b.
1.0 J
c.
2.2 J
d.
1.6 J
e.
3.2 J
c
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Suppose you receive a message from a starbase that is 13.0 light-years from earth. The message is dated July 15, 2127. What year does your calendar indicate at the time of reception if your calendar and the station’s calendar are correctly synchronized?
A. 2127 B. 2114 C. 2140 D. Other (specify)
Based solely on its distance from the Sun, we would expect the surface of Venus to be
A) colder than the Earth such that water would freeze B) warmer than the Earth, but not so warm that liquid water could not exist C) roughly the same temperature as the Earth so that water would mostly be in liquid form D) very much warmer than the Earth such that liquid water could not exist on the surface
The asteroid belt is believed to be debris left over from the age of formation of the solar system; the tidal effects of ________ probably prevented formation of a major planet there
Fill in the blank(s) with correct word