1. In Hooke's Law, F_s=-kx, at equilibrium the spring force and x are both equal to

A. 0

B. the frequency

C. the period

D. the amplitude

2.

Combining Coulomb's law and the equation for electric field strength gives the equation below. What does r stand for? q E = k C T2 O A gravity 0 velocity B 0 distance C 0 charge producing the field D