Why aren't stars visible in the sky during the day?
What will be an ideal response?
Answers may vary.
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The kinetic energy of a diver jumping from a tall circus pole
A. increases as potential energy decreases. B. is maximum at the bottom of the pole. C. is equal to her potential energy when half way down. D. all of the above
Cogeneration refers to
A. production of both electricity and usable steam or hot water by the same facility. B. sale of electrical power by consumers back to the electrical grid. C. cooperative efforts between power producers and consumers aimed at sharing profits from energy sales. D. the production of electricity using several different fuel sources at a single facility.
What is the term for the pair of ridges on the floodplain running parallel to the stream bank?
A. Stream terrace B. Levee C. Point bar D. Backswamp
Worldwide, the most widely used renewable energy source is ________
A) hydroelectric B) biomass C) solar D) wind E) nuclear