What three factors set convection currents in motion

Find the momentum for a 2.6-kg brick parachuting straight downward at a constant speed of 8.4 m/s .

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.

What can you increase the strength of an electromagnet by