Astraight, cylindrical wire lying along the x axis has a length l and a diameter d. it is made of a material described by ohm's law with a resistivity rho. assume potential v is maintained at the left end of the wire at x = 0. also assume the potential is zero at x = l. in terms of l, d, v, rho, and physical constants, derive expressions for the following. (use the following as necessary: l, d, v, rho, and π.)
(a) the electric field in the wire.
(b) the resistance of the wire.
(c) the electric current in the wire.
(d) the current density in the wire.
(e) show that e = rho. j

b.a device that inputs heat into a cool object

it doesn't. it was imagined up in the middle ages.

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force