Ratio of heat input to engine to heat remove from cold body
A heat engine of 30% thermal efficiency drives a refrigerator having a coefficient of performance of 4. Determine the ratio of the heat input to the engine to the heat remove from the cold body by the refrigerator.
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A sample of n = 25 scores is selected from a population with m = 100 with s = 20. On average, how much error would be expected between the sample mean and the population mean?
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