The storativity of a confined aquifer is found to be 1.8 x 10-4 as a result of a pumping test. The thickness of the aquifer is 50m and the porosity of the aquifer is 0.25. Determine the fractions of the expansibility of the water and the compressibility of the aquifer skeleton in making up the storativity of the aquifer. Assuming water is at 15ºC. The compressibility of water is 4.673x10-10 m2/N.

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?

Agas is compressed from vi 0.3 m, p 1 bar to of v2 0.1 m3, p2--3 bar. pressure and volume are related linearly during the process. for the gas, find the work, in kj.