Physics (AS & A Level) · May / June 2024 · Paper 53 · Question 2
9702
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A student investigates the sound from a horn attached to a car, as shown in Fig. 2.1. 894.2 Hz horn v Frequency: Fig. 2.1 (not to scale) A microphone is placed at the side of the road and connected to a frequency meter. The car travels towards the microphone. The frequency f of the sound detected by the microphone is read from the frequency meter. The speed of the car is measured by two speed detectors. The two measurements of speed are v1 and v2. The average speed v of the car is determined from v1 and v2. The experiment is repeated for different speeds of the car. It is suggested that f and v are related by the equation f = fsk k – v where fs is the frequency of the sound emitted by the horn and k is a constant. 1
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2(a)[1]
2(b)[2]
2(c)(i)[2]
2(c)(ii)[2]
2(c)(iii)[2]
2(c)(iv)[2]
2(d)(i)[2]
2(d)(ii)[1]
2(e)[1]
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