When there are more coils added to the wire of an electromagnet what happens to
the magnetic field?

A)The magnetic field increases

B)The magnetic field decreases

C)The magnetic field varies

D)The magnetic field stays the same.

Acar accelerates from 5.0 m/s to to 11 m/s at a rate of 3.0 m/s^2. how far does it travel while accelerating? 20m 117m 43m 16m

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?