Which statement best describes resistance? resistance is how well a current will flow in a material and is measured in volts. how well a material conducts an electrical charge and is measured in ohms. the ability of a material to attract a positive charge to create a current. the ability of a material to repel neutral charges and is measured in ohms. can any one ?

Aparticle of mass m is placed in a one-dimensional box of length l. the box is so small that the particle’s motion is relativistic, so that e p2/2m is not valid. (a) derive an expression for the energy levels of the particle using the relativistic energy–momentum relation and the quantization of momentum that derives from connement. (b) if the particle is an electron in a box of length l 1.00 1012 m, nd its lowest possible kinetic energy. by what percent is the nonrelativistic formula for the energy in error?