An iron block of unknown mass at 185F is dropped into an insulated tank that contains 0.8 ft3 of water at 70F. At the same time, a paddle wheel driven by a 200-W motor is activated to stir the water. Thermal equilibrium is established after 10 min with a final temperature of 75F. Determine (a) the mass of the iron block and (b) the entropy generated during this process.
An iron block of unknown mass at 185F is dropped into an insulated tank that contains 0.8 ft3 of water at 70F. At the same time, a paddle wheel driven by a 200-W motor is activated to stir the water. Thermal equilibrium is established after 10 min with a final temperature of 75F. Determine (a) the mass of the iron block and (b) the entropy generated during this process.
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An iron block of unknown mass at 185F is dropped
into an insulated tank that contains 0.8 ft3 of water at 70F. At the
same time, a paddle wheel driven by a 200-W motor is activated
to stir the water. Thermal equilibrium is established after 10 min
with a final temperature of 75F. Determine (a) the mass of the
iron block and (b) the entropy generated during this process.
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