March 30, 2017

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A digital audio compact disc carries data along a continuous spiral track from the inner circumference of the disc to the outside edge. Each bit occupies 0.60 mm of the track. A CD player turns the disc to carry the track counter-clockwise above a lens at a constant speed of 1.16 m/s. Find the required angular speed (a) at the beginning of the recording, where the spiral has a radius of 2.40cm.

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