A Carnot Refrigerator Has a Coefficient of Performance of 2

question 10

Multiple Choice

A Carnot refrigerator has a coefficient of performance of 2.5.The refrigerator consumes 50 W of power.How much heat is removed from the interior of the refrigerator in 1 hour?

• A) 7.5 kJ
• B) 450 kJ
• C) 180 kJ
• D) 720 kJ
• E) 72 kJ

Understand the various contexts within which learning occurs, including apprenticeships, and formal and informal educational settings.

Identify and differentiate between the methodologies of learning in traditional societies and modern contexts.

Recognize the effectiveness and characteristics of everyday problem-solving compared to abstract or school-based problem-solving.

Acknowledge the impact of socio-economic factors on access to quality education and cognitive development.

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Definitions:

Piaget

A psychologist best known for his theory of cognitive development that describes how children's intellect grows through stages.

Preoperational Stage

The second of Piaget’s stages, characterized by illogical use of words and symbols, spotty logic, and egocentrism.

Sensorimotor Stage

The first of Piaget’s stages of cognitive development, characterized by coordination of sensory information and motor activity, early exploration of the environment, and lack of language.

Concrete Operational Stage

Piaget’s third stage, characterized by logical thought concerning tangible objects, conservation, and subjective morality.