Exam-style question
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If the absolute temperature of a gas is doubled, what happens to the average kinetic energy of its molecules? Scenario focus: use thermal physics in a distinct A-Level Physics context and identify the relevant physical quantity before choosing the answer.
- A.It remains the same.
- B.It doubles.
- C.It triples.
- D.It halves.
Model answer
What a good answer should say
- It doubles.
Explanation
Why this works
The correct answer is It doubles.. This option is correct for Thermal physics because it applies the thermal physics idea in the stem and keeps the relevant quantity, unit, and physical conclusion together.
The alternatives either use a neighbouring formula, omit a required variable, or describe a different physical situation.
Common mistake
No common mistake is linked to this question yet.