Sand on a beach is covered by other layers of sand over time. the extra layers compress the first layer, packing it tighter and tighter. over time, the bottom layers of sand have formed into sandstone, with colored bands showing the different layers.
what kind of rock can sandstone be classified as?

"an open tank has the shape of a right circular cone. the tank is 6 feet across the top and 5 feet high. how much work is done in emptying the tank by pumping the water over the top edge? note: the density of water is 62.4 lbs per cubic foot."

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?

Carbon 14 is a naturally occurring stable