Answer:
The person must transfer energy at the rate of 1021.21 W
Explanation:
Given:
mass of the man, m = 79 klg
time, t = 26 minute
= 26 x 60
=1560 sec
Power produced by body = 135 W
Change in temperature, ΔT = 41 - 36
= 5°C
Let specific heat of man, [tex]c_{man}[/tex] =3500 J/kg °C
Therefore,
Heat transfer, Q = m.c.ΔT
= 79 x 3500 x 5
=1382500 J
Therefore, [tex]P_{cooling}[/tex] = Q / t
= 1382500 / 1560
= 886.21 W
Therefore, [tex]P_{requred}[/tex] = [tex]P_{cooling}[/tex] + power produced by body
= 886.21 + 135
= 1021.21 W
Thus, the person must transfer energy at the rate of 1021.21 W
