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If no friction acts on a diver during a dive, then which of the following statements is true? A. The total mechanical energy of the system increases. B. Potential energy can be converted into kinetic energy but not vice versa. C. (KE+ PE)beginning = (KE + PE)end D. all of the above
Weegy: c. (KE+PE) beginning = (KE + PE)end User: Which of the following types of transportation is NOT mass transportation? A. bus B. car C. streetcar D. train Weegy: c. (KE+PE) beginning = (KE + PE)end (More)
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Asked 7/23/2012 1:33:16 PM
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Solar cells convert what type of energy into electrical energy? A. electromagnetic B. nuclear C. chemical D. thermal
Weegy: B. nuclear (More)
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Asked 7/23/2012 1:29:22 PM
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Why is the gravitational potential energy of an object 1 meter above the moon’s surface less than its potential energy 1 meter above Earth’s surface? A. The object’s mass is less on the moon. B. The object’s weight is more on the moon. C. The object’s acceleration due to gravity is less on the moon. D. both a and c
Weegy: C. The object?s acceleration due to gravity is less on the moon. the acceleration due to gravity. [ GPE=m*g*h, and g is less on the moon than on Earth. In most contexts, I prefer to call it the strength of the gravitational field, measured in Newtons/kilogram, instead of the acceleration due to gravity. It is not necessarily an acceleration unless gravity is the only force involved in the motion of interest. Mass is NOT the answer, because mass is only depends on the amount of material. Weight would be the answer (GPE=m*g*h, m*g is weight), but the object doesn't weigh more on the moon, it weighs less on the moon. ] User: Which of the following increases when an object becomes warmer? A. chemical energy B. elastic potential energy C. nuclear energy D. thermal energy User: Nuclear power plants are designed to convert nuclear energy into what type of energy? A. mechanical B. geothermal C. chemical D. electrical User: The equation E = mc2 relates energy and A. force B. mass C. work D. gravity User: Which of the following is an example of an object with elastic potential energy? A. a wind-up toy that has been wound up B. a compressed basketball C. a stretched rubber band D. all of the above Weegy: D. All of the above (More)
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Asked 7/23/2012 1:39:43 PM
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