What is the resistance of a 3.1 m length of copper wire 1.7 mm in diameter?

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

In a system, when potential energy decreases, then entropy also decreases. true false

Aspecified volume of space contains an electric field for which the magnitude is given by e=e0cos(ωt). suppose that e0 = 20 v/m and ω = 1.0 × 107 s−1. part a what is the maximum displacement current through a 0.80 m2 cross-sectional area of this volume? express your answer with the appropriate units. idisp,max i d i s p , m a x = nothing nothing request answer part b how would this area have to be oriented relative to the electric field to get this maximum displacement current?