What is radioactive decay of granite

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Q. Radioactive decay of granite and other rocks in earth's interior provides sufficient energy to keep the interior molten, to heat lava, and to provide warmth to natural hot springs. This is due to the average release of about 0.03 J per kilogram each year. Show that at 500 C increase in temperature for a thermally insulated chunk of granite takes about 13.3 million years. (Assume that the specific heat of capacity c of granite is 800J/kg*C.

Reference no: EM1345431

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