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A cylinder fitted with a piston containing 1 kg of refrigerant 134a at 20C and 90% vapor quality is attached to a line flowing refrigerant 134a. The total restraining force on the piston is proportional to the cylinder volume squared. The valve is now opened and Refrigerant 134a flows into the cylinder until the mass inside is three times the initial mass and the final pressure in the cylinder is 900 kPa at which point the valve is closed. Determine the work done during this process, in kJ
Five pounds of propane have a volume of 1 ft3 and a pressure of 600 psi. Determine the temperature (in °R) using each of the following methods.
assume that a seismically excited system is accurately modeled by a mass attached to the ground by a spring and a
an airplane is flying at 300 mih at 4000 m standard altitude. as is typical the air velocity relative to the upper
two refrigerators are arranged in series. one of them receives 300 kjcycle from a reservoir at 300 k. the heat
the 1.3-lb collar slides with negligible friction on the fixed rod in the vertical plane. if the collar starts from
a piston-cylinder device contains an ideal gas. the gas undergoes two successive cooling processes by rejecting heat to
a river has a steady speed of 0.461 ms. a student swims upstream a distance of 1.00 km and swims back to the starting
a rigid tank 0.4 m3 contains air at 400 kpa and 30c and is connected by a valve to a piston-cylinder device with zero
Note that the positive y direction is downward and counterclockwise torques are positive. find alpha the angular acceleration?
a prototype 90 degree pipe elbow has ethyl alcohol at 20 degrees celsius flowing through it. the pressure drop through
the drive roller for a conveyor belt. a link a-b is rotating at 80 rpm counterclockwise .blink a-b is 60mm longlink b-c
the wheel consists of a 4-kg rim of 250-mm radius with hub and spokes of negligible mass. the wheel is mounted on the
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