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An initially empty spring-loaded piston/cylinder requires 100 kPa to float the piston. A compressor with a line and valve now charges the cylinder with water to a final pressure of 1.4 MPa, at which point the volume is 0.6 m3, state 2. The inlet condition to the reversible adiabatic compressor is saturated vapor at 100 kPa. After charging, the valve is closed and the water eventually cools to room temperature, 20?C, state 3. Find the final mass of water, the piston work from 1 to 2, the required compressor work, and the final pressure, P3.
If the allowable shear stress is 15ksi, determine the diameter of a solid shaft if it is to transmit 50hp at a frequency of (a) 900rpm, (b) 1800rpm
The student strikes the sign at a speed of 25 mi/h. if the student was travelling at 65 mi/h when the sign was first spotted, what was the student's associated perception reaction time
Determine the internal moments at A and B, then draw the moment diagram. Assume B and C are rollers. EI is constant. Show which FEM equations were used and how you determined them.
Name three types of metamorphic foliations, and draw a small sketch that shows a situation. Where a metamorphic foliation could cause problems in an excavation.
If the ultimate BOD of the mixed river water is 30mg/L, the rate constant for BOD at 20ºC is 0.6d-1, the reaeration rate constant at 20ºC is 0.8d-1, and the removal of BOD by sedimentation can be neglected
THE WATER TABLE OF A SATURATED , UNCONFINED AQUIFER COINCIDES WITH THE LAND SURFACE. THE AQUIFER IS 52 FT THICK AND THE MATERIAL HAS A UNIT WET WEIGHT OF 135 LB/FT^3.
A first order reaction is employed in a destruction kind of a certain kind of microorganism. ozone is used as the disinfectant and the reaction is found to be dC/dt=-kC. where C is the concentration of microorganisms, microbes/ml.
Design a one way slab to support a uniform live load of 300 psf. The beam is simply supported with a span of 20 ft. Use a reinforcement ration ( Ps) of 0.008 Use f'c=3000 psi and fy=60000 psi.
A fixed-bed carbon adsorption system consisting of two 3-foot-deep beds containing 6 x 16 mesh carbon operates at a superficial gas velocity of 60 ft/min
Determine the young's modulus for a metal whose elasic limit isone half of its UTS. The material has a strain of 0.002 at theelastc limit and a gauge length of 50mm. The UTS of the metal is300 MPa. The metal sample has a diameter of 20mm.
a draw the shearing force diagram and the moment diagram of the following problem. the beam is indeterminate. you need
A man has a mass of 100 kg. how much pressure would he apply to an I-beam if his shoes each have an area of 50 cm? what is his normal force?
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