Need some help with

  • Thread starter JoshHull
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OK, I have a question that I am trying to do for physics that I just cant figure out. I don't even know how to start it, so any help in getting started would be much appreciated. Here it is:

The total heat loss for a house is 500 W/(Degrees Celsius). The temperature outside the house is 10 (Degrees Celsius). Assume that the average power output for a human body is: 100 W. If there is no heat sources in the house, what will the temperature of the house be if there are 60 people in the house?

If anyone knows how to do the problem, or any ideas of where I should start, that would be great.

Thanks in advance.
 

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Andrew Mason
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JoshHull said:
The total heat loss for a house is 500 W/(Degrees Celsius). The temperature outside the house is 10 (Degrees Celsius). Assume that the average power output for a human body is: 100 W. If there is no heat sources in the house, what will the temperature of the house be if there are 60 people in the house?
This is a confusion statement of the problem. Can you give us the actual wording of the problem?

It appears to be a kind of simplified blackbody radiation problem.

If the total heat loss is 500 Watts/degree C of temperature difference and there are 6000 watts of heat being produced in the house, then the temperature will rise until 6000 watts are being lost. So the temperature will rise until there is a temperature difference of 12 degrees C. with the outside.

The problem is that it is not that simple. The rate of radiation loss increases as the fourth power of the temperature difference.

AM
 

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