The electric field due to charge Q at distance r away form Q is E. What is the electric field at distance 2r? 3r? What do you conclude?. What happens to field when distance is doubled?. When distance is tripled?

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.

How could you cause a chemical change to vinegar?

Each period of the periodic table ends with: 1. alkali metals such as na, k, li, and cs 2. period 7 elements 3. group viiia elements 4. the oxygen family 5. seven orbital shells