Which statement is true regarding copper's ability to conduct electricity?

copper is a good conductor of electricity because its atoms have a loosely held electron in their outer shell that is able to move freely to other atoms.
copper is a poor conductor of electricity because its atoms are held in positions that cannot move.
copper is a good conductor of electricity because its atoms have electrons that are tightly bound to their shells and will resist movement.
copper is a poor conductor of electricity because it has a free electron in its outer shell that will flow to other copper atoms.

Asquare 1m x 1m plate is shown below. all four of its edges are kept at 0 co. at t=0the temperature distribution is given by: y xtsins n75)=.a) using separation of variables determine the temperature distribution t(x,y,t)along the plate at any time t.b) discretize the heat conduction equation +=22222 txtusing a second-order centered difference scheme for the two second derivatives and a first-order forward euler scheme for the first derivative. using von neumann stability analysis, determine the stability criterion for the proposed discretization scheme in terms of , hand t. solve for the maximum allowable time step tmax