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7.2 The Universe and red-shift

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Question 15

A cyclist rings a bell while riding towards a stationary microphone. When the cyclist is stationary beside the microphone, the sound is recorded with a frequency of 680 Hz and a wavelength of 0.500 m. The speed of sound in the air remains 340 m/s.

Using v=fλv=f\lambdav=fλ, which pair of values could the microphone record as the cyclist approaches?

[1]
A

700 Hz700\ \mathrm{Hz}700 Hz and 0.500 m0.500\ \mathrm{m}0.500 m

B

680 Hz680\ \mathrm{Hz}680 Hz and 0.486 m0.486\ \mathrm{m}0.486 m

C

660 Hz660\ \mathrm{Hz}660 Hz and 0.515 m0.515\ \mathrm{m}0.515 m

D

700 Hz700\ \mathrm{Hz}700 Hz and 0.486 m0.486\ \mathrm{m}0.486 m

Markscheme

7.2 The Universe and red-shift Questions

  1. GCSE
  2. /Physics
  3. /7.2 The Universe and red-shift

94 exam-style questions on Edexcel GCSE Physics 7.2 The Universe and red-shift, covering 7.2.1 Big Bang and Steady State theories, 7.2.2 Evidence for the Big Bang, 7.2.3 The Doppler effect and red-shift, 7.2.4 Red-shift as evidence for an expanding Universe, and 7.2.5 The CMB and the accepted model. Each one has a worked solution and a mark scheme showing where the marks go.

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