A-LevelPhysicsWavesMay/June 2018Paper 2 Q47 Marks
A loudspeaker producing sound of constant frequency is placed near the open end of a pipe, as shown in Fig. 4.1. [Figure 4.1] A movable piston is at distance x from the open end of the pipe. Distance x is increased from x = 0 by moving the piston to the left with a constant speed of 0.75cms⁻¹. The speed of the sound in the pipe is 340ms⁻¹.
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