What is the Weight of Earth?

Don't SpAm​

How have the competing explanations' experiments on atoms affected the development of the atomic model?

The cerebellum controls? thirst sensations sleep-wake cycles hand-eye coordination heart rate and pulse

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?