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Thermal physics (A-level only)

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Question 6

An ideal gas consisting of NNN molecules, each of mass mmm, is confined within a cylindrical storage tank of radius RRR and height h=3Rh = 3Rh=3R.

Which of the following expressions correctly gives the pressure ppp exerted by the gas on the walls of the tank in terms of the root-mean-square speed crmsc_{\text{rms}}crms​?

A

mN3πR3crms2\frac{mN}{3\pi R^3} {c_{\text{rms}}}^23πR3mN​crms​2

B

mN9πR3crms2\frac{mN}{9\pi R^3} {c_{\text{rms}}}^29πR3mN​crms​2

C

mN27πR3crms2\frac{mN}{27\pi R^3} {c_{\text{rms}}}^227πR3mN​crms​2

D

3mNπR3crms2\frac{3mN}{\pi R^3} {c_{\text{rms}}}^2πR33mN​crms​2

Markscheme

Thermal physics (A-level only) Questions

  1. A Level
  2. /Physics
  3. /Thermal physics (A-level only)

48 exam-style questions on AQA A Level Physics Thermal physics (A-level only), covering Thermal energy transfer (A-level only), Ideal gases (A-level only), and Molecular kinetic theory model (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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