A hoop is rolling without slipping along a horizontal surface with a speed of 5.50 m/s when it starts up a ramp that makes an angle of 25.0° with the horizontal. What is the speed of the hoop after it has rolled 3.00 m up the ramp?
A) 4.22 m/s
B) 1.91 m/s
C) 2.06 m/s
D) 3.79 m/s
E) 8.02 m/s
A
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In a nuclear reactor, "chain reaction" refers primarily to
A. the process of heating water to create steam to generate electric power. B. the process by which the fission of one nucleus causes other nuclei to undergo fission. C. an out-of-control explosion. D. the enrichment of uranium to make fuel for the reactor.
What is the magnetic energy stored by a 300 mH inductor with a 2.0-A current going through it?
A. 0.60 J B. 1.2 J C. 30 mJ D. 0.15 J E. 0.075 J
What makes Neptune's moon Triton stand out from all the other large satellites in the Solar System?
a. originated as a comet b. the most geologically active c. the most reflective satellite d. largest satellite in the Solar System e. the only large satellite with a backward orbit
A police crime lab is trying to determine whether someone was murdered or died as a result of an accident. He was struck in the temple by a 4.20-kg sculpture that is alleged to have fallen off a bookcase. The sculpture presumably fell a distance of 1.43 m and the corner that struck him had an area of 0.250 cm2 . If the time for the sculpture to stop was 1.00 ms, the pressure on his temple, in
N/m2, was a. 8.89 × 10^4. b. 1.65 × 10^5. c. 1.65 × 10^6. d. 8.89 × 10^8. e. 1.65 × 10^9.