A copper wire has a diameter of 0.5mm and a resistance of 1.6*10^-8 Ωm. What will be the length of the wire to make its resistance to 10Ω ? How much does the resistance change if the resistance change if the diameter is double?

Determine the change in width a, height b, thickness t when a plate is subjected to the uniform distributed load and is made of material having modulus of elasticity e=230 gpa and poisson's ratio ν=1/3. given : a=400 mm and b= 300 mm also the uniformly distributed load in downward y direction of plate is 2 mn/m and in the positive x direction is 3 mn/m and t=20 mm