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May 25, 2015

Homework Help: Calc

Posted by Greg on Wednesday, December 2, 2009 at 1:10pm.

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 = -C(r/R)^2*ln(r/R)

where c is a positive constant. Find the following limits and interpret your answer

(a) lim R--->r+ (v)
(b) lim r----->0+ (v)

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