A Refrigerator Has a Coefficient of Performance Equal to 4

question 42

Multiple Choice

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

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

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Definitions:

Motor Skills

Abilities required to control the muscles and movements of the body, divided into fine (small movements) and gross (larger movements) motor skills.

Finely Tune

To make very small adjustments to something in order to achieve the best or desired performance.

Motivates

Provides reason or incentive for someone to act or behave in a certain way.

Baby's Posture

The typical positions or alignments adopted by an infant while sitting, standing, or lying.