1/ Singly charged gas ions are accelerated from rest through a voltage of 14.0 V. At what temperature (in K) will the average kinetic energy of gas molecules be the same as that given these ions? _______K

2/What are the sign and magnitude of a point charge that produces an electric potential of

2.16 V at a distance of 7.73 mm? ______ C

3/Find the ratio of speeds of an electron and a negative hydrogen ion (one having an extra electron) accelerated through the same voltage, assuming nonrelativistic final speeds. Take the mass of the hydrogen ion to be 1.67 10²⁷ kg. ____________(electron speed/ion speed)

4/ An evacuated tube uses an accelerating voltage of 39 kV to accelerate electrons to hit a copper plate and produce X-rays. Non-relativistically, what would be the maximum speed (in m/s) of these electrons? _______ m/s