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December 20, 2014

Homework Help: Physics

Posted by Maryo on Wednesday, March 24, 2010 at 1:36am.

The temperature in an electric oven is 160C. The temperature at the outer surface in the kitchen is 50C. The oven ( surface area = 1.6 m2) is insulated with material that has a thickness of 0.02 m and a thermal conductivity of 0.045 J/s.m.C. (a) How much energy is used to operate the oven for six hours?(b) At the price of $0.1/kw-hr for electrical energy, what is the cost of operating the oven?

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