Exam-style question
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A gas occupies a volume of 2.0 m³ at a pressure of 100,000 Pa. If the volume is reduced to 1.0 m³, what will be the new pressure of the gas, assuming temperature remains constant? Use Boyle's law. Scenario focus: use ideal gas reasoning in a distinct A-Level Physics context and identify the relevant physical quantity before choosing the answer.
Model answer
What a good answer should say
- The new pressure is 200,000 Pa.
Explanation
Why this works
The correct answer is The new pressure is 200,000 Pa.. This option is correct for Thermal physics because it applies the ideal gas reasoning 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
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