a 2200 kg car traveling at 30m/s collides with another 2200 kg car that is at rest. The bumpers lock together and the cars move forward together. what is their final velocity?

Ahypothesis is? close agreement by competent observers of observations of the same phenomena. a guess that has been tested over and over again and always found to be true. an educated guess that has yet to be proven by experiment. the long side of a right triangle. a synthesis of a large collection of information that includes guesses.

Astone is thrown into a pond. what happens to the amplitude of the resulting waves as they get farther from the point where the stone hit the water? explain.

The necleus of an atom is made up of what subatomic particles?