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Physics Help >> Index to Physics Homework Help » Thermodynamics Quiz 1

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A g piece of metal (specific heat of cal/g-ºC) is warmed so that its temperatre increases by ºC. How much heat (in calories) was transferred into it?

A window pane cm thick has an area of square meters. The temperature difference between the inside and outside surfaces of the window is ºC . What is the rate of heat flow through this window in J/s if the thermal conductivity for glass is 0.8 J/s-m-ºC?

How many kilowatt hours of energy are required to raise the temperature of gal of water by ºC? One gal of water has a mass of about 3.8 kg and the specific heat of water is 4186 J/kg-ºC

How many kg of ice need to be added to kg of water at ºC to cool the water to ºC? (Lf = 80 kcal/kg)

An engine exhausts J of heat while performing J of useful work. What is the per cent efficiency of the engine?

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