URGENT!! I need help with these questions ASAP. Please show work and please do not just write random stuff and collect points I have put this same thing up 5 times because of that :/

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e

An object in mechanical equilibrium is an object

Is the number of complete movements of a wave per second.