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:

Young Adults

Individuals in the age range of approximately 20 to 40 years, often experiencing major life transitions such as higher education, career development, and beginning of families.

EEG

Electroencephalogram; a test used to find abnormalities related to electrical activity of the brain.

Delta Waves

Long, slow brain waves that indicate the deepest stage of sleep.

REM Sleep

A phase of sleep characterized by rapid eye movements, where dreaming often occurs and brain activity is high, resembling wakefulness.