Modern astronomers have observed the complete life cycle for many stars, making stellar evolution one of the best-tested astronomical theories
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FALSE
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Torque: The lug nuts on a car wheel require tightening to a torque of 90 N ? m. If a 30-cm long wrench is used, what is the magnitude of the minimum force required using the wrench?
A. 300 N B. 150 N C. 30 N D. 15 N
Two vehicles with equal magnitudes of momentum traveling at right angles to each other undergo an inelastic collision. The magnitude of momentum for the combined wreck is
A) the same as the magnitude of momentum of either car before collision. B) less than the magnitude of momentum of either car before collision. C) greater than the magnitude of momentum of either car before collision. D) none of the above
Which of the following units is not an energy unit?
A. Calorie B. Horsepower C. Kilocalorie D. Joule E. Kilowatt-hour
The Oort Cloud lies closer to the Sun than the Kuiper Belt
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