Use the concept of energy to explain why ideal mechanical advantage is not the same as mechanical advantage for real machines.

The slope of a good speed time indicates ? a. velocity b. acceleration c. direction d. speed

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 not am example of a polymer? protein nylon kevlar concreta