Three advantages of simple machines. please tell fast

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.

Which of the following is considered to be a vector?               a.  temperature    b.  velocity    c.  time    d.  mass

Explain vector addition, triangle method and parallelogram method