A solid body from the outer solar system that arrives intact on the Earth's surface is called a(n) ________
Fill in the blank(s) with correct word
meteorite
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Which of the following best describes what we mean by the focal plane of a telescope?
A) It is the place where, if we mounted film or an electronic detector, we could get a clear (not blurry) image of an object viewed through the telescope. B) It is the upper surface of the telescope's primary lens or mirror. C) It is the lower surface of the telescope's primary lens or mirror. D) It is the surface of the lens on the eyepiece, through which you would look to see objects in the telescope's field of view.
A photon hitting an electron (mass m) at rest can create an electron–antielectron pair in addition to the original electron. Assume that the two electrons and the positron move away from the collision at rest with respect to each other afterward. What was the photon’s initial energy?
A. Zero B. m C. 2m D. 3m E. 4m
During a collision with a wall, the velocity of a 0.200-kg ball changes from 20.0 m/s toward the wall to 12.0 m/s away from the wall. If the time the ball was in contact with the wall was 60
0 ms, what was the magnitude of the average force applied to the ball? A) 40.0 N B) 107 N C) 16.7 N D) 26.7 N E) 13.3 N
What is the minimum amount of energy required for a 60.0-kg climber carrying a 18-kg pack to climb Mt. Everest, 8 250 m high?
a. 6.3E+6 J b. 3.4E+6 J c. 4.9E+6 J d. 6.4E+5 J e. 3.5E+5 J