Engineering, 02.02.2022 05:40 avahrider1
A cup of coffee is heated in a microwave oven. If heat (through radiation) is added at a constant rate of 200 W and the cup contains 0.3 kg of coffee.
a. Determine the rate of change of the specific internal energy of the coffee.
b. Assuming the density of coffee to be 1000 kg/m 3 and the specific internal energy in kJ/kg to be related to temperature through u=4.2T, where T is in Kelvin, determine how long does it take for the temperature of the coffee to increase by 20 o C.
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A cup of coffee is heated in a microwave oven. If heat (through radiation) is added at a constant ra...
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