Milgram's experiment was trying to find out why people:

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.

What quantity do units represent in value

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.