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Air expands in a piston-cylinder device with a polytropic exponent of 1.3. The initial pressure and temperature were 630 KPa and 550oC respectively. The final pressure is 100 kPa. Find the specific entropy change of the gas for the process. Air can be assumed to be an ideal gas( with average values of "Cp" and "R" as 1.005 kJ/kg K and 0.287 kJ/kg K respectively).
Two control rods are attached at A to lever AB. Using trigonometry and knowing that force in the right-hand rod is F2=20 lb, determine a.) the required force F1 in the left-hand rod if the resultant R of the forces exerted by the rods on the le..
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
what energy practices today are unsustainable? list three examples and write a short paragraph on each explaining why
water is the working fluid in a vapor power cycle. the pressure and temperature at the turbine inlet are 1600 psia and
a piston-cylinder assembly is fitted with stops. the assembly contains 0.1 kg of water initially at 1 mpa and 500degc.
consider the sysstem shown in figure 3-45 where m 2 kg b 4 nxm and k 20 nm. assume that x0 0.1 m and xdot0 0. the
determine the average applied force exerted on to the pile hammer. Note because the force is applied over a short time period it can be considered as an impulse force.
a room that normally contains 40 people is to be air-conditioned with window air- conditioning units of 5-kw cooling
a person is riding merrily along on his road bicycle at v mph. what is the approximate minimum speed v in mph necessary
steam is generated in a boiler. if the initial water enters the boiler as saturated water at 1000 psi a h542.4 btuibm
qualitatively plot the following processes on p-v t-v and p-t diagrams. use an arrow sign pointing to the process
What will be the length of the specimen after the load is removed? d) The specimen was reloaded until fracture. If the % reduction in area after fracture was 40%, what is the minimum diameter of the specimen at fracture?
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