Hi, I'm new to this site. Anyway, I am studying for the MCAT right now and the physical science review that I have been doing has gone pretty well, I just have a few questions about comparisons that can be made between movement of electrons and movement of solid objects. 1) What is the difference between V (voltage potential) and Potential Energy. Is voltage the relative amount of attraction that electrons have towards an electronegative pole? Is it allright for me to use stream metaphor. If a waterfall (flow of electrons) can fall from a higher distance than the voltage (potential energy of water at top and kinetic energy at bottom) will be greater. 2) If this is the case how can one visualize the potential energy that a capacitor can store? PE=.5(Q)V or PE = 1/2(C)V*V. I thought that voltage was the potential energy. Thanks for any help contributed.