In an area where there is an electric field of 33,000 j V/m…

 In an area where there is an electric field of 33,000 j V/m, a proton is fired with an initial velocity of 25,000 I m/s. Find a) the velocity and direction (relative to the x axis) of the proton exactly 7.91 ns after the proton is fired b) the kinetic energy of the proton at that same moment.

A heart defibrillator has a bank of eight identical 8.80 μF…

A heart defibrillator has a bank of eight identical 8.80 μF capacitors in parallel. The eight capacitors each have a dielectric thickness of 0.090 mm, a dielectric constant of 110 and a dielectric strength of 55.0 x 106 V/m.  The capacitors are charged to 80% of their maximum working voltage before being discharged across the patient’s chest in a very short (10.0 ms) burst. Calculate the average power dissipated across the patient’s chest during the discharge. This power may appear very large (it is) but it is only for a very short time – just long enough to get your heart to start pumping.