Practice Refrigerators And Air Conditioners (5.1) - Physics in The Real World (Applications)

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9 questions

Flashcard drill
3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is the first step in the refrigeration cycle?
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Think of how pressure increases.
Question 2.
What happens during condensation?
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It cools down and changes state.
3Question 3.
What is the primary function of a refrigerator?
- To cool food
- To heat food
- To freeze food
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Think about its main use.
4Question 4.
True or False: The expansion phase reduces the temperature of the refrigerant.
- True
- False
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Consider what happens during this phase.
Question 5.
If a refrigerator has a coefficient of performance (COP) of 3, how much work is done if it removes 600 J of heat?
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Think about the definition of COP.
Question 6.
Consider a system where the refrigerant does not effectively absorb heat during evaporation. What could be some potential effects on the refrigerator's efficiency?
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Think about heat absorption and cooling function.

5 more questions in this section. Enroll free to practise them all.