Use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the curves about the given axis. y = cos(πx/2), y = 0, 0 ≤ x ≤ 1; about the y-axis

Which of the following list the divisions of the geologic time scale in order from longest to shortest

Why does the equilibrium position of the spring change when a mass is added to the spring? will the mass oscillate around the new equilibrium position of the spring or the previous position without a mass attached to the spring? if the equilibrium position of the spring changes by 20 cm (assuming no initial mass) when a mass is added to the spring with constant 4.9 kg/s^2, what is the mass of the object attached to the spring?

Scientists discovered fossils in several layers of the earth you see here. they found fossils of algae, snails, and clams in layer d. given that information, where do you think they found fossil evidence of simple land plants and amphibians?