Digital bits on a 12.0-cm diameter audio CD are encoded

Chapter 2, Problem 14

(choose chapter or problem)

Digital bits on a 12.0-cm diameter audio CD are encoded along an outward spiraling path that starts at radius and finishes at radius The distance between the centers of neighboring spiralwindings is (a) Determine the total length of the spiraling path. [Hint: Imagine unwinding the spiral into a straight path of width and note that the original spiral and the straight path both occupy the same area.] (b) To read information, a CD player adjusts the rotation of the CD so that the players readout laser moves along the spiral path at a constant speed of about Estimate the maximum playing time of such a CD