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A vertical piston-cylinder that initially has a volume of 0.2m^3 is filled with 0.2kg of air. The piston is weighed so that the pressure on the air is always maintained @ 2 bars. Heat transfer is allowed to take place until the volume is 75% of its initial value.
Determine A) the initial and final temperature of the air in K. and B) the quantity and direction of the heat transfer in KJ. Air is modeled as an ideal gas.
Steam at 0.2 Mpa and 300 degrees Celsius is mixed with cold water at 20 degrees celsius and 0.2 MPa to produce 20 kg/s of saturated liquid water at 0.2 MPa. Find the required steam and cold water flow rates.
A copper and nickel alloy has the following composition: 80wt% Cu and 20wt% Ni. Convert the composition to atomic percent.
Derive the material balance equation for a tank with rigid and incompressible fluids for the following conditions...The tank is initially full of oil at Pi some oil is bled off to reduce the pressure to P1 the oil removed from the tank is collected a..
Extensive testing of an experimental 2820-lb automobile reveals the aerodynamic drag force FD and the total no aerodynamic rolling-resistance force FR to be as shown in the plot. Determine (a) the power required for steady speeds of 22 and 44 mi/hr o..
At one section in an air distribution system, air at 14.7 psi and 100degree F has a velocity of 1200 ft/min a and the duct is 12 in x12 in square. At another section the duct is round with a diameter of 18 inches and the velocity is 900 ft/min. Calcu..
A rock weighs 90.8 N in air and 45 N when completely submerged in water. Determine the specific volume of the rock in m3/kg
A turbine extracts energy from water flowing through a 11-cm-diameter pipe at a pressure of 700 kPa with an average velocity of 11 m/s. If the turbine is 90 percent efficient, how much energy can be produced if the water is emitted from the turbine t..
1750g of air performs an expansion work of 3100kJ on the surrounding as it expands isothermally to a pressure of 63000kPa ad a volume of 0.065 cubic meters. Determine the temperature of the air and the initial volume.
In a polytropic process, a fluid is compressed to 2.75 times its initial pressure, whereas its temperature becomes1.65 times. What is the fluids index of expansion, n? 1.2kg of Air at a pressure of 2.15MPa and a temperature of 585K, undergoes a rever..
Air exerts a pressure of 900KPa within a 0.45 cubic meter container of fixed volume. It is cooled such that the pressure falls to 3.25bar. The temperature of the air is then measured and was found to be 285C. Determine the mass of the air, the initia..
Verify that heating the wire may be treated as a lumped-capacity process, find the steady-state temperature of the wire and find how long it takes for the temperature of the wire to reach 100°C.
a battery of cylindrical hollow-fiber membranes is operated at steady state to concentrate a bacterial suspension from
a cube of aluminum 10 cm on each side is initially at a temperature of 300degc and is immersed in a fluid at 100degc.
a can containing 350cm3 of compressed air at 10bar 20 degrees c is placed inside a closed rigid insulated and evacuated
the interior contents and materials of a small building weigh 25 tons and together they have an average specific heat
a volume of 0.3 m3 of o2 at 200 k and 8 mpa is mixed with 0.5 m3 n2 at the same temperature and pressure forming a
a transparent rigid container is filled with 2 gallons of water. initially the pressure is measured to be 10.2 psig
heat is transferred to a cylinder having a fixed volume of 6 m3 containing 0.1 m3 of saturated liquid water and 5.9 m3
a grade 30 cast iron pressure vessel has a sealed head diamter of 20 inches. it uses ten 114 unf steel studs that are
the unit cells of several orthorhombic crystals are described below. what is the bravais lattice of each and how do you
suppose another stone is thrown horizontally from the same building. if it strikes the ground 67 m away find the
water at 1mpa and 65oc enters a tube of a boiler which has a constant 160mm inside-diameter. the water leaves the tube
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