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:

Secondary Immune Response

The response of the immune system upon its second or subsequent exposure to a specific antigen, typically faster and more vigorous than the primary response.

Primary Immune Response

The initial response of the immune system to a foreign antigen, characterized by the activation and proliferation of immune cells.

Initial Exposure

The first encounter or introduction to a stimulus, substance, or environment which may influence subsequent responses.

Vaccination

The administration of a vaccine to stimulate an individual's immune system to develop adaptive immunity to a pathogen.