9. In an experiment, the independent variable is (2 points)
never changed by the scientist
not important to the scientist
not recorded by the scientist
changed by the scientist

Explain using examples, what is simple harmonic motion and why it is an important area of study in physics.

(1 point) match the differential equations and their vector valued function solutions. you may wish to multiply at least one solution out fully, to make sure that you know how to do it. you can get the other answers quickly by process of elimination and just multiply out one row element.

The energy equivalent of the rest mass of an electron is