A mass attached to a horizontal spring is displaced from it’…

A mass attached to a horizontal spring is displaced from it’s equilibrium position value by 0.1 m, and then released. It then oscillates back and forth about it’s equilibrium position (i.e. it vibrates). While vibrating, the mass undergoes 20 complete oscillations over 5 seconds.  What is the frequency of oscillation in SI units?

A metal sphere initially holds no charge.  A glass wand has…

A metal sphere initially holds no charge.  A glass wand has +2 C on it’s tip, and it is brought into proximity of the metal sphere.  The metal sphere has no electrical contact or connection with the wand or anything else through the process.  Which best describes what will happen to the sphere?