A Heat Engine Having the Maximum Possible Efficiency Has an Efficiency

question 459

Multiple Choice

A heat engine having the maximum possible efficiency has an efficiency of 25% when operating between two heat reservoirs. If the temperature of the cold reservoir is 300 K, what is the
Temperature of the hot reservoir?

• A) 375 K
• B) 350 K
• C) 450 K
• D) 500 K
• E) 400 K

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Definitions:

Double-blind Study

A study design in which neither the participants nor the researchers know which participants belong to the control group and which belong to the experimental group until the conclusion of the research.

Experimental Drug

A pharmaceutical compound that is in the process of being tested for effectiveness and safety in treating a particular disease or condition but has not yet received governmental approval for general use.

Placebo

A substance with no therapeutic effect, used as a control in testing new drugs.

Control Group

In experimental research, this is the group of participants not exposed to the experimental treatment, serving as a baseline to compare with the experimental or treatment group.