A metal cable has radius r and is covered by insulation so that the distance from the
Chapter 4, Problem 82(choose chapter or problem)
A metal cable has radius r and is covered by insulation so that the distance from the center of the cable to the exterior of the insulation is R. The velocity v of an electrical impulse in the cable is v 2cS r RD 2 lnS r RD where c is a positive constant. Find the following limits and interpret your answers. (a) lim Rlr1 v (b) lim rl01
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