A Refrigerator Has a Coefficient of Performance Equal to 4

question 15

Multiple Choice

A refrigerator has a coefficient of performance equal to 4.2.How much work must be done on the operating gas in the refrigerator in order to remove 250 J of heat from the interior compartment?

• A)60 J
• B)120 J
• C)250 J
• D)480 J
• E)1050 J

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Definitions:

F-distribution

A probability distribution that arises in the analysis of variance and is used to calculate whether two observed variances are significantly different.

Matched Pairs

A study design where subjects are paired based on certain criteria, ensuring that each pair is similar except for the treatment given.

Mean Difference

The average difference between two sets of data points, often used in comparing the means from two samples.

Independent Populations

Populations that have no influence on one another, implying that the selection from one population does not affect the selection from another.