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1. The temperature inside a refrigerator is 4oC, and the ambient temperature in the kitchen is 25oC. Heat leaks into the refrigerator at 300W.
(a) If we assume that the refrigerator’s motor is a Carnot heat pump and that the approach temperature in the coils is 5oC, how much power must be supplied to the refrigerator?
(b) Now suppose that the approach temperature is 2oC. How does this affect the power requirement?
How were earthquake intensities measured before the advent of the Richter Scale? What were the problems with that scale and how is the Richter scale far superior?
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You have 100 mL of 0.08 M phosphate buffer at pH 6.0. By accident, 3.2 mL of 6 M HCl was added. What is the resulting pH? The pka’s of phosphate are 2.14, 6.86, 12.4.
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The 30-Years War in the 17th century originally started out as religious conflict between Catholic and Protestants and later on developed as a political conflict
Describe two fundamental differences, one governmental and one economic, between the 1950s and today. Briefly discuss one reason why these differences promoted a period of relative stability in 1950s American family life.
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