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Q. Friction provides the force needed for a car to travel around a flat, circular race track. What is the maximum speed at which a car can safely travel if the radius of the track is 83.0 m and the coefficient of friction is 0.44?

Q. Two loudspeakers are placed above and below one another, and are driven by the same source at a frequency of 500 Hz.

a.What minimum distance should the top speaker be moved back in order to create destructive interference between the speakers?

b.If the top speaker is moved back twice the distance calculated in part (a), will there be constructive or destructive interference?

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Category:- Physics
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