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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..
air enters a compressor at 300 k and 100 kpa at a volumetric flow rate of 4 m3s. the air is compressed such that the
Fluid Statics: Submerged Submarine, A submarine is at a depth of 2000 ft from the water surface. The atmospheric pressure above the water is at 14.7 psia
honda civic 2012 model has an epa rating of 28 mpg city and 39 mpg highway. what is the thermal efficiency of honda
a clock face has negative point charges -q -2q -3q middot middot middot -12q fixed at the positions of the
a ball rolls on the interior of a paraboloid of revolution given by x2y2cz. the angle of rotation about z axis is
consider a small simple rankine power cycle which produces 600kw power from an electric generator with an efficiency of
Given a lifting (rotating) cylinder in cross flow of radius a with a lift coefficient of C1=5, calculate the peak (suction) pressure coefficient, Cp. Use potential flow relations and assume 2-D.
In a wind tunnel, a flow is sped up. In the reservoir, the velocity is approximately zero. In the test section, the air is at standard conditions with a flow speed of 30 m/s. What is the total pressure in the test section (in Pa)? What is the static ..
bob is asked to design a system for heating process water in a chemical plant. the system is to heat 500 gallons of
block c starts from rest at t 0 and moves downward with a constant accelerration of 4 ins2 . knowing that block b has
derive shear modulus g or bulk modulus k of isotropic materials in terms of youngs modulus e and poissons ratio v. use
determine the ratio of butadiene to syrene mers in a copolymer having a weight average molecular weight of 350000 gmol
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