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(3) f(4) P8. ...

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(3) f(4) P8. A moving car encounters air resistance which isproportional to the square of the speed of the carThe ratio of the power required at 40 km/h to thatrequired at 80 km/h, to move at constant speed(3) 1 16(4) 16:140mlong chain of linear mass density

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