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A mass of 5 kg of saturated liquid-vapor mixture of water is contained in a piston-cylinder device at 125 kPa. Initially, 2 kg of the water is in the liquid phase and the rest is in the vapor phase. Heat is now transferred to the water, and the piston, which is resting on a set of stops, starts moving when the pressure inside reaches 300 kPa . Heat transfer continues until the total volume increases by 20 percent.
Determine (a) the initial and final temperatures, (b) the mass of liquid water when the piston first start moving, and (c) the work done during this process. Also show the process on a P-v diagram.
The bottom bar is made up of an aluminum bar and a steel bar, each 10 in. long placed in the parallel configuration at 70 F. That is also heated to 300 F.
The magnetic north azimuth of a line is 128 degrees 27' while the magnetic declination is 3 degrees 30'E. What is the astronomic azimuth of the line (in decimal degrees)?
If an additional 11-ft lane is added (each direction) and all other factors stay the same, what will be the new level of service?
a) Calculate Darcy's velocity of the groundowater as well as the amount of water that passes through the aquifer each day. b) for the same aquifer, determine the seepage velocity of water through aquifer if the effective porosity is 32%.
Forces F and P have magnitudes of F=40 lb. and P= 60 lb., Using the paralellogram law, determine the magnitude of the resultant R and the angle theta it makes with the horizontal. The given angle is 40 degrees.
A 2.0-ft^3 object weighing 650 lb is attached to a balloon of negligible weight and released in the ocean (γ = 64 lb/ft^3). The balloon was originally inflated with 5.0 lb of air to a pressure of 20 psi.
If the resultant force is directed along the boom from point A towards O, determine the values of x and z for the coordinates of point C. Set F sub B equal to 1490 N and F sub C equal to 2320 N.
A bolt located 50 mm fm he center of an automobile wheel is tightened by applying the couple for 0.10 s. Assuming that the wheel is free to rotate and is initially at rest, determine the resulting angular velocity of the wheel.
Three streams of polluted air are combined prior to treatment in an electrostatic precipitator (ESP). The flow and particulate concentration of each stream are 600 cfm at150 mg/m^3, 700 cfm at 200 mg/m^3, and 500 cfm at 1000 mg/m^3.
Calculate the equilibrium concentration of dissolved oxygen in 15oC water at 1 atm, and again at 2000 m elevation.
Using Raoult's Law or Henry's Law, as appropriate, calculate the pressure and mole fractions in the vapor phase for a system containing a liquid that is 0.3% N2 and 99.7% water (by moles) in equilibrium with its vapor at 80 °C.
If the pH of a natural water is 7.8, and the alkalinity was measured to be 125 meq/L, determine the following: - Alkalinity as mg/L CaCo3 - Approximate the total carbonate concentration (Ct), in moles per liter.
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