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In the USA the unit gpd/sqft (gallon per day per square foot) is often used to measure the hydraulic conductivity k, and the specific discharge q. In Europe the standard unit is m/s (meter per second), following the unification initiated by Napoleon around 1800. European scientists consider this to be more convenient, but the unit gpd/sqft has the advantage that the magnitude of a value is easier to imagine. Furthermore, European engineers may be tempted to think that the specific discharge is a velocity, because it is expressed in m/s. However, it is not, as the average velocity is v = q/n, where n is the porosity. American engineers will not have that idea, because they are used to express a velocity in mph, and that seems to be quite different from gpd/sqft. What is the relation between the two units?
An ideal gas, with temperature independent Cp=(7/2)R, at 15c and having an initial volume of 60m^3, is heated at constant pressure (P=0.1013 MPa) to 30c by transfer of heat from a reservoir at 50c. Calculate delS(gas), delS(heat reservoir), delS(univ..
Fluid/Dam Pressure, Compare the pressure force exerted on the face of two dams that hold a fresh water of 1000 Kg/m^3 density and a salty water of 1030 Kg/m^3
Using Newton Raphson method, solve the above equation for as a function of z. Vary z from 0.001 to 0.1 cm in increments of 0.01 cm. plot versus z.
A cylindrical log has a diameter of 450 mm and a length of 6.75 m. When the log is floating in fresh water with its long axis horizontal, 110 mm of its diameter is above the surface. What is the specific weight of the wood in the log?
A maximum flow rate of 6 CFS is available for a river model. This corresponds to 30,000 CFS for the prototype. What is the scale of the model in terms of the prototype size?
a motor car shaft consist of a steel tube 30 mm internal diameter and 4 mm thick .thee engine develops 10kw at
Model a cup of coffee as a closed system containing 1 lbm of pure water at constant pressure of 14.7 psia. Using your knowledge of the 2nd Law, prove that it would be impossible for coffee at room temperature of 70 °F to heat up to 120 °F by receivin..
How much extra water does a 147-lb concrete canoe displace compared to an ultra-lightweight 40-lb Kevlar canoe of the same size carrying the same load?
In a laboratory quick sand is being produced in a large cylindrical tank, by pumping water into it from below, while the excess of water flows over the top of the tank, back into the reservoir. How deep will a student sink into the fluidized mixtu..
To solve ax = b Find a number y such that ay is integer (and possibly a factor of b) Then if k Ay = b, the answer is ky What is the concept they understood?
A plumbing fixture outlet is 18 ft above the water service line. Pressure available at the water service is 80 psi. Determine the change in pressure from elevation.
a gas contained in a cylinder goes through 2 processes in series. first from 1 to 2 is constant pressure compression 50
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