Suppose a diode consists of a cylindrical cathode with a radius of 6.200102 , mounted coaxially within a cylindrical anode with a radius of 0.5580 .

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10−2 , mounted coaxially within a cylindrical anode with a radius of 0.5580 . The potential difference between the anode and cathode is 335 . An electron leaves the surface of the cathode with zero initial speed (). Find its speed when it strikes the anode.