A Refrigerator Has a Coefficient of Performance Equal to 4

question 58

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 energy from the interior compartment?

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

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Definitions:

Antigens

Substances (often proteins) on the surface of cells, viruses, fungi, or bacteria that the immune system recognizes and targets.

Lymphatic Capillaries

Small, thin-walled vessels that are the starting point of the lymphatic system, responsible for the absorption of interstitial fluid and its return to the bloodstream.

Autoimmune Diseases

Conditions where the immune system mistakenly attacks the body's own cells, leading to inflammation and tissue damage.

Antibodies

Substances created by the immune system to detect and render harmless external threats like viruses and bacteria.