The drift speed in a copper wire is 4.08 × 10-5 m/s for a typical electron current. calculate the magnitude of the electric field inside the copper wire. the mobility of mobile electrons in copper is 4.5 × 10-3 (m/s)/(n/c). (note that though the electric field in the wire is very small, it is adequate to push a sizable electron current through the copper wire.)

Unpolarized light of intensity so passes through two sheets of polarizing material whose transmission axes make an angle of 60∘ with each other as shown in the figure. what is the intensity of the transmitted beam, st?

The air that we breath is made mostly of which gaseous molecule

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.