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Air is compressed by 10.50-kW compressor form P1 to P2. The air temperature is maintained constant at 26ºC during this process as a result of heat transfer to the surrounding medium at 10ºC. Determine the rate of entropy change of the air.
A glass contains a mixture of water and ice cubes, with a total mass of 0.2 kg and at a temperature of 0 C. The mass of ice cubes is 1/3 of the mass of the mixture in the glass. As a result of heat transfer from the surroundings at 20 Celsius degree ..
a 9 m3 tank has two sections separated by a membrane both of which contain nitrogen gas. the nitrogen in section a has
A cylindrical shaft if 80mm long with a 20mm dia and is fixed to a wall at one end. If a shear force of 10kN is applied vertically at the free end, what is the shear strain?
determine the microstructure for eutectoid steel that has undergone the following heat treatment. for each heat
A piston -cylinder device contains 0.06 m3 of saturated water vapor at 350 KPa pressure. Determine the temperature and the mass of the vapor inside the cylinder.
an air conditioning system is used to maintain a house at 20 degrees celcius when the outside temperature is 35 degrees
a piston-cylinder device contains 5 kg of r134a at 800 kpa and 60 c. the refrigerant is now cooled at constant pressure
a tapered structural steel column with a circular cross-section varies linearly from a radius of 25 mm to 15 mm over a
a seismic instrument has a natural frequency of 20 hz and a damping ratio of 0.65. determine the maximum input
a pressure tranducer outputs 0.23 volts at 2.39 psi and 4.71 volts at 28.13 psi. assuming the pressure transducer is
a flow of 4 kgs ammonia goes through a device in a polytropic process with an inlet state of 150 kpa -20degc and an
1- describe some of the important steps in the preparation of a written document. what role do written documents play
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