Physics · Oct / Nov 2018 · Paper 12 · Question 15
5054Particle model
Air is trapped in a cylinder by a piston. The pressure of the air is p and the length of the air column is 20 cm. The piston is moved outwards until the length of the air column has increased by 40 cm. The temperature of the air remains constant. [diagram of cylinder with trapped air, 20 cm and 40 cm labels] What is the new air pressure?
- Ap/2
- Bp/3
- C2p
- D3p
As printed in the paper
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Correct answer: B. p/3
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