During a period of drought, the static water level in an aquifer has dropped to an elevation of 620.4 ft. The drought is broken by a prolonged period of rain in which the measured infiltration was 3.4 in. The storage coefficient is 0.25. What is the elevation of the static water level after the rainfall

Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

Calculate the bore of a cylinder that has a stroke of 18 inches and an extension time of 6 seconds at a flow rate of 4 gal/min.