Cart a, with a mass of 0.2 kg, travels on a horizontal air track at 3 m/s and hits cart b, which has a mass of 0.4 kg and is initially at rest. after the collision the center of mass of the two cart system has a speed in m/s of: 0 m/s 1.0 m/s 2.3 m/s 2.5 m/s 5.0 m/s

The mass of a muon is 207 times the electron mass; the average lifetime of muons at rest is 2.21 μs. in a certain experiment, muons moving through a laboratory are measured to have an average lifetime of 7.04 μs. for the moving muons, what are (a) β (b) k, and (c) p? the rest energy of the electron is 0.511 mev.

A110-pound person pulls herself up 4.0 feet. this took her 2.5 seconds. how much power was developed? 0.13 hp 0.32 hp 2.0 hp 3.1 hp

Astate of matter all that has define volume and can flow is a(n)