A 120,000 kg train car moving at 4.5 m/s (about 10 miles/hr) collides with another train car of mass 130,000 kg. What would be the velocity of the two if they couple together and the second car was moving at 2.0 m/s in the opposite direction before the collision?

In 1980, alfa romeo introduced the first system to smooth a rough idle caused by ignition and camshaft timing changes.

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.

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd question 6 options: 3000 joules 30 joules 320 joules 3200 joules