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A 1.5 m cylinder of radius 1.1 cm is made of a complicated mixture materials. Its resistivity depends on the distance x from the left and obeys the formula p(x)=a+bx^2, where a and b are constants. At the left, the resistivity is 2.25*10^-8 ohms*m, while at the right end its 8.5*10^-8 ohms*m

a) What is the resistance of the rod?

b) what is the electric field at its midpoint if it carries a 1.75-A current?

c) If we cut the rod into two 75-cm halves, what is the resistance of each half?

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