25 The speed limit for vehicles on a road is 100 km hr A policeman...
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25 The speed limit for vehicles on a road is 100 km hr A policeman detects a drop of 20 in the pitch of the horn of a car as it passes him Is the policeman justified in punishing the car driver for crossing the speed limit Velocity of sound in air 340 m s
25 The speed limit for vehicles on a road is 100 km hr A policeman detects a drop of 20 in the pitch of the horn of a car as it passes him Is the policeman justified in punishing the car driver for crossing the speed limit Velocity of sound in air 340 m s
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