ANSWER ASAP
Which is the most accurate description of potassium (K)?

A. It is a metalloid.

B. It is dull, brittle, and a poor conductor of electricity.

C. It will tend to gain an electron in a chemical reaction.

D. It will tend to lose an electron in a chemical reaction.

The roller coaster from problem #1 then tops a second hill at 15.0 m/s, how high is the second hill? 91.5 m 79.2 m 80.0 m 68.5 m

Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.15 times a second. a tack is stuck in the tire at a distance of 0.373 m from the rotation axis. noting that for every rotation the tack travels one circumference (a) find the tack's tangential speed. (b) what is the tacks radial acceleration?

What happens when a rubber rod is rubbed with a piece of fur?