The marianas trench, where the pacific plate descends under the leading edge of the eurasian plate, is the deepest sea floor in the world. these ocean trenches form when two oceanic plates collide

Let f(x) = x4- 8x2 . find the relativeextrema of this function using the second derivative test.

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Water is siphoned from a large tank and discharges into the atmosphere through a 50-mm diameter tube. the end of the tube is b = 2.1 m below the tank bottom which is a = 7.4 m deep, and viscous effects are negligible. determine the maximum height h over which the water can be siphoned without cavitation occurring. atmospheric pressure is 101.4 kpa, and the water vapor pressure is 1.79 kpa (absolute)