20 POINTS !!! A .357 kg set of keys is being swung on a lanyard that is 56 cm long. If a centripetal force of 11.0 N is applied, what is the speed of the keys?

How to tell if a molecule is polar or nonpolar with electronegativity

(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.

If two students are running down the hall toward each other, trying to get to class, and they have the same mass and acceleration, what will happen when they collide? will their forces cancel out or will each one experience a reaction?