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A piston-cylinder device with a set of stops initially contains 0.3 kg of air at 10 atm and 400?C. The location of the stops corresponds to 60% of the initial volume. The gas now undergoes cooling and the piston drops, maintaining a constant pressure until it reaches the stops. The cooling process continues until the temperature has dropped to 25?C. a) Determine the work done and the heat transferred during the cooling process up to the point when the piston reaches the stops. b) What is the final pressure in the cylinder? c) How much heat is lost to the surrounding during the entire process?
a link AC has uniform rectangular cross section 3mm thick and 25mm wide. Determine the normal stress in the central portion of that link? solution
a cast-iron cylinder of 300mm bore carries a pressure of 30 newtons per square millimetrewhat should be its thickness
(a) Sketch the cycle on a p V diagram. (b) Calculate the net work for the cycle, in kJ. (c) Calculate the heat transfer for process 2 3, in kJ. (d) Calculate the heat transfer for process 3 1, in kJ. (e) Is this a power cycle or a refrigeration cy..
If the wide-flange beam is subjected to a share of V = 25 kip, determine the maximum shear stress in the beam.
The system shown anchors a stanchion of cable-suspended roof. If the tension in cable AB is 900 kN, what are the tensions in cables EF and EG?
prepare the project objectives based on the requirement out lined at the next page.the following is the project
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.
What load P allow can be supported at the midpoint of the bar if the yield stress in the steel wires is 220 MPa and in the aluminium wire is 80 MPa? A saftey factor of n = 2 is needed.
two particles a and b start from rest at the origin s 0 and move along a straight line such that aa 6t-3fts2 and ab
two equal-length springs are nested together in order to form a shock absorber. if it is designed to arrest the motion
A piston-cylinder device is insulated and contains 0.005 m3 of saturated liquid water at a constant pressure of l50 kPa. An electric resistance heater inside the cylinder is now turned on, and 1800 kJ of energy is transferred to the steam.
a l-shaped bracket lying in a horizontal plane supports a load p as shown. the bracket has a hollow rectangular cross
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