Water is supplied to an office building 31.5 m high through a pipe at ground level.
(a) find the minimum pressure in the supply pipe so that water can reach the top floor of the building.

(b) suppose the pressure in the supply pipe is designed so that water can flow out through a much smaller pipe on the top floor at a speed of 4.65 m/s. find the pressure in the larger pipe on the ground floor.

the first correct answer will get the brainliest

Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?

Oxygen undergoes an isentropic expansion from 120 degree c and 280 kpa absolute to 140 kpa absolute. determine the final temperature of the oxygen and the amount of work per kg of o_2 produced in the process if it is adiabatic.

Much of the information taught in earth-space science would not be available if it weren’t for our remote sensing abilities. explain two ways our remote sensing strategies contribute to our knowledge of these topics.