75%(4)3 out of 4 people found this document helpful
This preview shows page 6 - 8 out of 8 pages.
Chapter 27.8Sketch the graphs of the given functions. Check each by displaying the graph on a calculator.8.x
Megan JohnstonWeek 5 Homework09/30/201928. The insulation resistance R (in Ω/m) of a shielded cable is given by R =kln(r2/r1). Here r1and r2are the inner and outer radii of the insulation. Find the expression for dR/dr2if k and r1are constant.