A Refrigerator Has a Coefficient of Performance of 4

question 21

Multiple Choice

A refrigerator has a coefficient of performance of 4. If the refrigerator absorbs 30 cal of heat from the cold reservoir in each cycle, the heat expelled (in cal) into the heat reservoir is

• A) 40.5
• B) 37.5
• C) 36.5
• D) 34.5
• E) 22.5

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Definitions:

Future Value

The value of an investment or asset at a specific future date, accounting for specified interest rates or returns.

Present Value

The today's value of a sum of money expected in the future or successive cash flows, considering a determined rate of return.

Compound Interest

Compound interest is the interest calculated on the initial principal and also on the accumulated interest of previous periods of a deposit or loan.

Future Value

An estimated future value of a present asset, projected by applying an anticipated growth rate over time.