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A-LevelPhysicsWaves9702/12 · Oct/Nov 2019 · Q211 Mark

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. [Figure showing Graph 1 (displacement vs time, period 1.0 s) and Graph 2 (displacement vs distance, wavelength 90 cm)] What is the speed of the wave?

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A22.5 cm s⁻¹
B30.0 cm s⁻¹
C90.0 cm s⁻¹
D120 cm s⁻¹

✓ Correct answer

D: 120 cm s⁻¹

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About this question

Topic
Waves, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source
A-Level Physics, Oct/Nov 2019 Paper 1 Variant 2, question 21.

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