We are asked to calculate the total amount of energy in kcal radiated to the surroundings by an adult over a 25 h period.
A watt is a measure of power (the rate of energy change) equal to 1 J/s.
An adult person radiates heat to the surroundings at about the same rate as a 100-watt electric incandescent light bulb. What is the total amount of energy in kcal radiated to the surroundings by an adult over a 25 h period?
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