19. A 16pF parallel-plate capacitor is charged by a 10V battery. If each plate of the capacitor has an area of 5cm2 , what is the energy stored in the capacitor? What is the energy density (energy per unit volume) in the electric field of the capacitor if the plates are separated by air?

An implanted pacemaker supplies the heart with 72 pulses per minute, each pulse providing 6.0 v for 0.65 ms. the resistance of the heart muscle between the pacemaker’s electrodes is 550 ω. find (a) the current that flows during a pulse, (b) the energy delivered in one pulse, and (c) the average power supplied by the pacemaker.

Need in all of themmm only answer if you know plsssss

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain