The electric potential energy stored in the capacitor of a defibrillator is 73 j, and the capacitance is 120 f. what is the potential difference that exists across the capacitor plates?

The relationship between electrical potential energy (PE), capacitance (C), and potential difference (V) can be expressed through the equation,

                                  V  = PE / C

V is equal to the quotient of potential energy and capacitance.

When we substitute the known values from the item,

                               V =  73 J/ 120 C

                                    V = 0.61 J/C

Thus, the voltage or potential difference is equal to 0.61 V. 

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.