When you send a wave pulse down a rope or Slinky, it eventually dies out. What has become of the energy?
A) It was transformed into electromagnetic energy.
B) It was transformed into Italian sausage.
C) It was transformed into thermal energy.
D) It was transformed into elastic energy.
E) It vanished because energy is always lost in all physical processes.
C
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A mass suspended from a spring moves with the greatest velocity
A. at the end points of its motion B. at the equilibrium position C. midway between the end point of its motion and the equilibrium position
What is the main reason mountaintops are so cold?
A) The air is thinner at higher altitudes. B) Mountaintops are above much of the greenhouse gas in the atmosphere. C) The winds are stronger at higher altitudes. D) There is more water vapor at higher altitudes, causing there to be more snow. E) All of the above are true.
In addition to being the largest moon in the solar system, Ganymede, the Galilean moon of Jupiter, is
A) the only moon to have its own internal magnetic field B) the only moon to have its own atmosphere C) more geologically active than the Earth D) the only moon to show evidence for a subsurface ocean of water
Given that our galaxy has a volume of approximately 8 1012 ly3, what is the average distance between civilizations if there are currently 1 million intelligent civilizations in our galaxy?
A) 1,500 ly B) 200 ly C) 320 ly D) 2,800 ly