Sound waves travel at different speeds depending on the medium. Rank the following from fast to slow Air

Wood

Water

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?

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

Name two kinds of practical electric pumps.