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Short answer·Hard exam skill (4/5)·No calculator

Difficulty guide

The label describes the problem, not your ability.

1/5 - Foundational

Warm-up setup; checks one basic idea.

2/5 - Routine exam skill

Normal syllabus skill; usually one main rule or interpretation.

3/5 - Standard multi-step

Exam-style problem with multiple steps or a common trap.

4/5 - Hard exam skill

High-end exam problem; combines methods carefully.

5/5 - Challenge

Stretch problem beyond normal exam pressure.

Question

A gas goes from state A to state B along a straight line on a P−VP-V graph. At A, P=1.0×105 PaP=1.0\times10^5\text{ Pa}; at B, P=2.0×105 PaP=2.0\times10^5\text{ Pa}. The volume increases from 0.010 m30.010\text{ m}^3 to 0.030 m30.030\text{ m}^3.
Total: 3 marks

(a) Find the average pressure along the straight path. (1 mark)

(b) Find the work done by the gas. (2 marks)

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cbse-physics-11.u8.t8-3.saq.007

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