The body has as a temperature of 30 degrees Celsius. If its surface area is 1.25m^2, what is the net rate of heat loss from his body by radiation considering that the surrounding temperature is 20 degrees Celsius? Note: the emissivity of the body is very close to unity, irrespective of skin pigmentation. A. 72 W B. 75 W C. 40 W D. 50 W

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