The terrestrial planets in our solar system are ________
A) Pluto and Eris B) Mars, Jupiter, Saturn, Uranus, and Neptune
C) Mercury, Venus, Earth, and Mars D) Jupiter, Saturn, Uranus, and Neptune
C
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Characteristics of Waves: What is the frequency of the wave shown in the figure?
A. 0.5 Hz. B. 1 Hz. C. 2 Hz. D. 4 Hz. E. It cannot be determined from the given information.
Angular Momentum: Three solid, uniform, cylindrical flywheels, each of mass 65.0 kg and radius 1.47 m, rotate independently around a common axis through their centers. Two of the flywheels rotate in one direction at 8.94 rad/s, but the other one rotates in the opposite direction at 3.42 rad/s. Calculate the magnitude of the net angular momentum of the system.
A. 1020 kg ? m2/s B. 1500 kg ? m2/s C. 975 kg ? m2/s D. 940 kg ? m2/s
Why did the solar nebula flatten into a disk?
A) The interstellar cloud from which the solar nebula formed was originally somewhat flat. B) The force of gravity from the Sun pulled the material downward into a flat disk. C) As the nebula cooled, the gas and dust settled onto a disk. D) It flattened as a consequence of collisions between particles in the spinning nebula, changing random motions into more orderly ones. E) The force of gravity from the planets pulled the material downward into a flat disk.
A heat engine absorbs energy of magnitude |QH| as heat from a high temperature reservoir, does work of magnitude |W|, and transfers energy of magnitude |QL| as heat to a low temperature reservoir. Its efficiency is:
A. |QH|/|W| B. |QL|/|W| C. |QH|/|QL| D. |W|/|QH| E. |W|/|QL|