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A rigid, insulated tank contains 0.6 kg of air, initially at 200 kPa, 20°C. The air is stirred by a paddle wheel until it's pressure is 250 kPa. Determine the (a) work in kJ, (b) the change in exergy of the air in kJ, and (c) the amount of exergy destroyed, in kJ. Kinetic and potential energy effects can be ignored and the dead state is To= 20°C, Po =100 kPa.
a gas is contained ina vertical, frictionless piston cylinder device.the piston has a mass of 4kg and a crossectional area of 35cm^2. a compressed spring is above the piston exerts a force of 60N on the piston .if the atmospheric pressure is 95kpa..
Building HVAC Requirements - Indoor Air Quality and Mechanical Ventilation and how determine the size of the equipment if i need for 60cfm.?
At a section in a passage, the pressure is 150 kPa (abs), the temperature is 10 deg C, and the speed is 120 m/s. For isentropic flow of air, determine the Mach number at the point where the pressure is 50 kPa (abs). Sketch the passage shape.
a spherical cryosurgical probe may be imbedded in diseased tissue for the purpose of freezing and thereby destroying
a 2.5 hp motor is used to move an 200lbf object across a horizontal surface at a velocity of 22 fts in a time period of
air at 100 kpa and 27degc enters an isentropic compressor at a rate of 100 ls and leaves at 1000 kpa. determine the
one pound mass of water in a piston-cylinder assembly initially a saturated liquid at 1 atm undergoes a
during a particular thunderstorm the electric potential difference between a cloud and the ground is vcloud - vground
We're asked to determine the deflection of a beam location for a 2000N load. However the force is directed up the corner NOT centroid.
Define- hydraulic mean radius, hydraulic dept, section factor and most efficient dhannel cross section.
A similar measurement is made applying the force parallel to one of the cube axes. Explain why the two measurements give different values of the elastic modulus.
a large tower is to be supported by a series of steel wires.it is estimated that the load on each wire will be 11100N. determine the minimum required wire diameter assuming a factor of safety of 2 and a yield strength of 1030MPa.
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