Consider a simple parallel-plate capacitor whose plates aregiven equal and opposite charges and are separated by adistance d. Suppose the plates are pulled apart until they areseparated by a distance D > d. The electrostatic energystored in the capacitor is1. greater than2. the same as3. smaller thanand what is also the ans before the plates were pulled apart?

In a game of pool, ball a is moving with a velocity v0 of magnitude v0 = 15 ft/s when it strikes balls b and c, which are at rest and aligned as shown. knowing that after the collision the three balls move in the directions indicated and assuming frictionless surfaces and perfectly elastic impact (that is, conservation of energy), determine the magnitudes of the velocities va, vb, and vc.