Two conductors are made of the same material and have the same length. conductor a is a solid wire of diameter 0.79 mm. conductor b is a hollow tube of outside diameter 1.4 mm and inside diameter 0.91 mm. what is the resistance ratio ra/rb, measured between their ends?

Charge is distributed along the entire x-axis with uniform density λ. how much work does the electric field of this charge distribution do on an electron that moves along the y-axis from y = a to y = b? (use the following as necessary: a, b, ε0, λ, and q for the charge on an electron.)