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ID: 2119709 • Letter: #

Question


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Assuming your skin temperature is 37.2 %u2218C and the temperature of your surroundings is 21.8%u2218, determine the length of time required for you to radiate away the energy gained by eating a 289-Calorie ice cream cone. Let the emissivity of your skin be 0.915 and its area be 1.25m2 . ( t=?h)


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PLEASE ANSWER CORRECTLY: ANSWER 1: i have tried but all answers below are wrong

Deduction: -3%


  t = 0.00303611   h  

Explanation / Answer

t=(289*4186)/(0.915*5.67 x10^-8*1.25*[310.35^4 - 294.95^4]

=10916.9 sec

=10916.9/3600 hr

=3.032 hr