The US Geological Survey wants to know how long it will take for a contaminant in an aquifer to research a monitoring well. They will first need to determine the velocity at which the groundwater is traveling. Given that the hydraulic gradient is 0.00115, hydraulic conductivity is 1000m/d, and a porosity is 0.23 find:a. The Darcy velocityb. The actual linear velocity.

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater

Ahe-xe mixture containing a 0.75 mole fraction of helium is used for cooling electronics in an avionics application. at a temperature of 300 k and atmospheric pressure, calculate the mass fraction of helium and the mass density, molar concentration and molecular weight of the mixture. if the cooling capacity is 10 l, what is the mass of the coolant?

Wiy doeres rere okhn a pump whon working betwon the same pressure range?