Linear momentum is conserved in
a. an inelastic collision.
b. an elastic collision.
c. any collision where two objects rebound off each other.
d. none of the above.
a, b, c
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One kilogram of chilled water at 32°F (0°C) is placed in a freezer which is kept at 0°F (?18°C). Approximately how much electric energy (in kilocalories) is needed to operate the compressor to cool this water to 0°F if the room temperature is maintained at 75°F (24°C)? (LF,ice = 3.33 × 105 J/kg; cice = 2.09 × 103 J/kg?°C)
A. 13 B. 1.5 C. 15 D. 16 E. 33
Why does the merger of two spiral galaxies often trigger starbursts?
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Today's CO2 abundance is approximately ________ times the average value over the last 800,000 years.
A) 18 B) 1.8 C) 1.18 D) 0.18
Two satellites with equal rest masses are traveling toward each other in deep space. One is traveling at 0.550c and the other at 0.750c. The satellites collide and stick together. What is the speed of the combined object after the collision?
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