In a volcanic eruption, 2km3 of mountain with a density of 1600 kg=m3 was lifted an average height of 513m.
(a) How much energy in joules was released in this eruption?
(b) The energy released by thermonuclear bombs is measured in megatons of TNT, where 1 megaton of TNT = 4.2 * 10 15 J. Convert your answer for (a) to megatons of TNT.
Answer:
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Velma and Mort pass each other, in rocket ships, at a relative velocity of half of lightspeed. Velma has an ice cream cone which will melt in 5 minutes if not refrigerated. She removes her cone from the refrigerator, and allows it to melt
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