As a tile falls from the roof of a building to the ground its momentum is conserved
A) True
B) False
B
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The escape velocity inside a black hole is
A. half the speed of light. B. infinity. C. greater than the speed of light. D. zero. E. unknown.
At the time of the winter solstice (the start of winter) the sunlight is at a lower angle and thus is ____ than(as) in the start of summer in the northern hemisphere
a. less intense b. more intense c. the same intensity
Active galaxies are having their central engines temporarily fed by what occurrence?
A) a sudden surge in star formation in the nucleus B) a series of supernovae all occurring in the dense nuclear bulge C) a close interaction with a neighboring galaxy D) attack by a swarm of globular clusters E) the merger of a binary black hole system
A 0.30-m-radius automobile tire accelerates from rest at a constant 2.0 rad/s2 over a 5.0-s interval. What is the tangential component of acceleration for a point on the outer edge of the tire during the 5.0-s interval?
a. 33 m/s2 b. 6.7 m/s2 c. 0.60 m/s2 d. 0.30 m/s2