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

 New Problems reloads the page with new variable values in all questions. You must do this after grading the test to rework it another time. Make sure to enter your answers in the specified units .

 1
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?

 2
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?

 3
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

 4
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)

 5
An engine exhausts J of heat while performing J of useful work. What is the per cent efficiency of the engine?

Once you have submitted your answers for grading by clicking the grade button, you cannot resubmit answers for the same Problem Set--you must use the 'New Problems' button first.