CSEC Physics · May/June 2012 · Paper 2 · Question 6(b)

Carl and his friend Tommy were doing a School-Based Assessment on estimating the speed of sound in air using an echo method. Carl stands 100 m from a wall. Carl claps two wooden blocks to produce a series of echoes and Tommy who was standing beside him starts his stop watch. After 1 echo Tommy stops the watch. This process is repeated and the time for 50 echoes was calculated to be 30.3 s.

Calculate the speed of the sound generated.

This question uses a figure or table from the paper — you'll see it when you practise.