Dòng điện đi qua mọi vật dẫn thông thường đều làm cho vật dẫn này?

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

An electron is ejected into a horizontal uniform e⃗ field at a parallel horizontal velocity of v0. assume the electron's initial position x0, initial velocity v0, time t, magnitude of electric field e, electron's mass m, and the magnitude of the electron's charge |e|. ignore the force that earth exerts on the electron. assume the e⃗ field is in the same direction as the initial velocity. part a define the equation for the electron's velocity. express your answer in terms of the variables v0, |e|, t, e, and m.

What is an electric motor? explain its operation. 2-3 sentence