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3 marksProperties of Waves

CAPE Physics Unit 1 · 2013 · Paper 2 · Question 2(b)

A rifle was fired in a valley. The echo was heard 8.3 seconds later. If the temperature in the valley is 10 °C, determine the distance between the shooter and the reflecting valley wall. (Assume that the speed of sound = 340 m s⁻¹ at 0 °C and that for every 1 °C rise in temperature, the velocity of sound increases by 0.61 m s⁻¹.)

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Other parts of this question

  1. 2(a)Identify ONE similarity and ONE difference between transverse and longitudinal waves. Give an example of EACH type of wave.[4 marks]
  2. 2(c)(i)Complete Table 2 on page 8 by inserting the missing values.[2 marks]
  3. 2(c)(ii)On the grid provided on page 9, plot a graph of d against t/2. Draw the best straight line through the points.[4 marks]
  4. 2(c)(iii)Use your graph to determine the speed of sound, s.[2 marks]

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