I need some help with my hw What is the initial electric potential energy of an electron leaving a 200-volt battery if the charge of an electron is 1.602×10−19 coulombs?
3.204×10^−19 joules
8.01×10^−22 joules
3.204×10^−17 joules
8.01×10^−20 joules

4)A device designed to shoot projectiles consists of a spring with spring constant kmewtons/meter that has been compressed Δx meters. A marble of mass m kilograms is loaded into the device. If the entire device is at an initial height h meters and is moving at an initial velocity v meters/second, which equation best represents the magnitude of the total initial energy E, in joules, of the system?

E=12mgh+12kΔx2+12mv2

E=mgh+12kΔx2+12mv2

E=mgh+kΔx2+12mv2

E=mgh+kΔx2+mv2