An Engine Delivers 40

question 3

Multiple Choice

An engine delivers 40.0 J of work while it takes in energy from a 400 K thermal source. If the engine discharges energy into a thermal reservoir at 200 K, then what is the least amount of heat needed to run the engine?

• A) 55.0 J
• B) 65.0 J
• C) 80.0 J
• D) 110 J

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Definitions:

Population Growth

The increase in the number of individuals in a population, often measured by the birth rate minus the death rate, immigration, and emigration.

Total Abstinence

A commitment to completely foregoing certain behaviors or substances, often used in the context of avoiding alcohol or drugs.

Hormonal Implant

A small rod implanted under the skin that releases hormones to prevent pregnancy.

Birth Control

Methods or devices used to prevent pregnancy as part of family planning.