Solved: While running, a 70-kg student generates thermal

Chapter 17, Problem 17.25

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While running, a 70-kg student generates thermal energy at a rate of 1200 W. For the runner to maintain a constant body temperature of 37C, this energy must be removed by perspiration or other mechanisms. If these mechanisms failed and the energy could not flow out of the students body, for what amount of time could a student run before irreversible body damage occurred? (Note: Protein structures in the body are irreversibly damaged if body temperature rises to 44C or higher. The specific heat of a typical human body is 3480 J>kg # K, slightly less than that of water. The difference is due to the presence of protein, fat, and minerals, which have lower specific heats.)