Two Refrigerators,one with a COP of 4

question 51

Multiple Choice

Two refrigerators,one with a COP of 4.0 and another with a COP of 5.0,both extract 400 kJ of heat from the cold reservoir (food) .Calculate the difference in energy they exhaust to the hot reservoir and hence the room.

• A)320 kJ
• B)80 kJ
• C)125 kJ
• D)100 kJ
• E)20 kJ

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Definitions:

Central Tendency

A statistical measure that identifies a single value as representative of an entire distribution, such as the mean, median, or mode.

Numerical Information

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The science of collecting, analyzing, interpreting, and presenting data.

Mathematics

The abstract science of number, quantity, and space, either as abstract concepts (pure mathematics) or as applied to other disciplines such as physics and engineering (applied mathematics).