Physics (AS & A Level) · Oct / Nov 2019 · Paper 12 · Question 21
The two graphs represent the same wave. Graph 1 shows the variation with time of the displacement at a particular distance. Graph 2 shows the variation with distance of the displacement at one instant. [graphs showing displacement against time and displacement against distance] What is the speed of the wave?
- A22.5 cm s–1
- B30.0 cm s–1
- C90.0 cm s–1
- D120 cm s–1
As printed in the paper
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Correct answer: D. 120 cm s–1
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