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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define the Coefficient of Performance (COP).
💡 Hint: Think about its use in refrigerators and heat pumps.
Question 2
Easy
What is the function of a refrigerator?
💡 Hint: Consider what happens to food inside when it’s warm.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does the Coefficient of Performance (COP) measure?
- Heat Removed
- Heat Added
- Efficiency of Heat Transfer
💡 Hint: Think about how we define efficiency.
Question 2
True or False? Heat pumps can only cool spaces.
- True
- False
💡 Hint: Recall the dual purpose of heat pumps.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A refrigerator removes 800 J of heat from food and requires 200 J of work. What is its COP? What would be the COP if the work input increased to 300 J?
💡 Hint: Use COP formula for both scenarios.
Question 2
Design a simple experiment to test how different temperature settings on a refrigerator affect its COP using a thermometer and a stopwatch.
💡 Hint: Remember to control variables like initial conditions.
Challenge and get performance evaluation