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Predicting the time of death. A person is found dead at 5pm in a room whose temperature is 20C. The surface temperature of the body
Predicting the time of death. A person is found dead at 5pm in a room whose temperature is 20C. The surface temperature of the body is measured to be 25C when found, and the heat transfer coefficient is estimated to be h=8W/m2C. The body can be assumed to be a cylinder ( 30cm diameter, 1.7m long). Since the human body is greater than 70% water, the properties of the body can be assumed to be constant over the temperature range and taken as: k=0.617W/mC,=996 kg/m3, and cp=4178J/kgC. (i) Estimate the time of death of that person using lumped parameter analysis. (ii) Estimate the time of death using the timetemperature plots. (iii) Compare the results and comment on the relative accuracy
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