Water that flows from behind a large dam can cause machines to produce electricity. what change take place? heat energy into mechanical energy, sound energy changes into electrical energy, chemical energy is used to produce electrical energy, mechanical energy is used to produce electrical energy.

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.