Question

The basal metabolic rate is the rate at which energy is produced in the body when a person is at rest. A 70.0 kg person of height 1.79 m would have a body surface area of approximately 1.90 m^2. What is the net amount of heat this person could radiate per second into a room at 19.0 degrees celsius if his skin's surface temperature is 31.0 degrees celsius? (At such temperatures, nearly all the heat is infrared radiation, for which the body's emissivity is 1.00, regardless of the amount of pigment.)

Answer 1

amount: sigma*episilon*T^4

so considering the heat out and heat in..

Netamoun=1*1.90*sigma(273+31)^4 * ((273+19)/(273+31))^4

where sigma is the Stephan constant

I get near 780 watts net