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A rigid tank contains 5 kg of refrigerant-134a initially at 20°C and 140 kPa. The refrigerant is now cooled while being stirred until its pressure drops to 100 kPa. Determine the entropy change of the refrigerant during this process.
a tank with volume 3.0m3 contains steam at 2mpa and 280 c. the tank is heated until the temperature reaches 440 c. a
a reheat cycle operates with initial steam conditions of 1500 psia and 1000 degrees fahrenheit at the inlet to the
a piston cylinder device contains 1 kg of liquid water at 200kpa and 25 deg c. heat is added to the water in the
a Steel ally to be used for a spring application must have a modulus of resilience of at least 2.07 MPa. What must be the metal's minimum yield strength.
a vertical piston-cylinder device initially contains 0.25 m3 of air at 600 kpa andnbsp300degc. a valve connected to the
a frac12 -in-diameter unf sae grade 5.2 bolt with rolled threads is preloaded to 80 of its proof load when clamping a
a hydraulic press is powered by a remote high-pressure pump. the gage pressure at the pump outlet is 22 mpa whereas the
in flowing from section 1 to section 2 along an open channel the water depth decreases by a factor of 2 and the froude
The weight W causes a tension of 100lb in cable CD. If d= 2ft, what is the momentum about the z axis due to the force exerted by the cable CD at point C?
calculate the hourly gas flow rate for the conditions given as followsreadings differential pressure 50-in water static
A small droplet of liquid detergent, falling through air in a spray drying tower, has its diameter reduced as water evaporates from the surface. If we assume that the temperature of the liquid within the drop remains at 290 K and the dry air is at..
an incompressible newtonian fluid flows steadily between two infinitely long concentric cylinders of radius ri and ro
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