a cylindrical wire of lenght 2.80m and a radius of 1.35A, when the voltage of 0.0320v is applied across the ends of the wire. from what material is the wire made of?

Answer 1

need radius of wire, not just current

R = V/i = .0320/1.35 = .0237 Ohms
= resistivity * Length/area

so resistivity = .0237 * pi r^2 /2.8

table of conductivity and resistivity here
http://hyperphysics.phy-astr.gsu.edu/hbase/tables/rstiv.html