an object accelerates at the rate of 1.30 m/s2 over a displacement of 11.8m, with an initial velocity of 7.0m/s. for what length was it accelerating?

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.

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?

What sort of waves exhibit the doppler effect?