Question 7: (1 point) After your succesful experiment building a mass spectrometer, you decide to build a nitrogen laser. YouTube vidoes suggest that all you need is a few sheets of polished aluminum, some power supplies, and other assorted electrical components. You manage to find two pieces of aluminum of dimensions 0.8 m by 32 cm and you parallel plate capacitor with a spacing of 0.1 mm. The laser relies on breakdown of the air in between the plates. Knowing that the breakdown of air requires an electric field of 3kV/mm, how much voltage do you need to charge the plates to in order to achieve breakdown? Once breakdown occurs, the capacitor acts like a short circuit and allows all of the energy to released. If a nitrogen laser is 10% efficient at converting that electrical energy to light, how much energy is in each light pulse? Optional: The pulse duration of a nitrogen laser is to a good approximation just the amount of time it take the light to traverse the long distance of the capacitor (0.8 m). Use this to determine the average power in each laser pulse. W. Question 8: (1 point) You have a parallel plate capacitor with Capacitance 380 /F, connected to a battery with EMF of 5 V. You then increase the distance between the parallel plates by 50% while keeping it connected to the battery. a) How much energy is initially stored by the capacitor? b) How much energy is stored by the capacitor after the distance between the plates has been increased ? c) How much work has gone into charging the battery? d) How much mechanical work did you have to do to separate the plates