Physics · Oct / Nov 2017 · Paper 22 · Question 6
5054
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Fig. 6.1 shows a girl standing a few hundred metres in front of a large building. Fig. 6.1 (not to scale) The girl uses a signal generator and a loudspeaker to send a short pulse of sound towards the building. The sound has a frequency of 3700 Hz. A short time later, the girl hears an echo.
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6(a)[1]
6(b)(i)[1]
6(b)(ii)[1]
6(c)[2]
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