Why does the speed of sound depend on air temperature?

What is tan(61)? а. 1.80 b. 0.49 c. 0.61 d. 0.87

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?

If you put a helium-filled balloon in the refrigerator, what will happen?