Q: A 0.3-m3 rigid tank is filled with saturated
A 0.3-m3 rigid tank is filled with saturated liquid water at 200°C. A valve at the bottom of the tank is opened, and liquid is withdrawn from the tank. Heat is transferred to the water such...
See AnswerQ: The air-release flap on a hot-air balloon is
The air-release flap on a hot-air balloon is used to release hot air from the balloon when appropriate. On one hot-air balloon, the air release opening has an area of 0.5 m2, and the filling opening h...
See AnswerQ: A balloon initially contains 40 m3 of helium gas at atmospheric conditions
A balloon initially contains 40 m3 of helium gas at atmospheric conditions of 100 kPa and 17°C. The balloon is connected by a valve to a large reservoir that supplies helium gas at 125 kPa...
See AnswerQ: An insulated 0.15-m3 tank contains helium at 3
An insulated 0.15-m3 tank contains helium at 3 MPa and 130°C. A valve is now opened, allowing some helium to escape. The valve is closed when one-half of the initial mass has escaped. Determine the fi...
See AnswerQ: A vertical piston–cylinder device initially contains 0.2 m3
A vertical piston–cylinder device initially contains 0.2 m3 of air at 20°C. The mass of the piston is such that it maintains a constant pressure of 300 kPa inside. Now a valve connected to the cylinde...
See AnswerQ: A vertical piston–cylinder device initially contains 0.25 m3
A vertical piston–cylinder device initially contains 0.25 m3 of air at 600 kPa and 300°C. A valve connected to the cylinder is now opened, and air is allowed to escape unt...
See AnswerQ: A vertical piston–cylinder device initially contains 0.01 m3
A vertical piston–cylinder device initially contains 0.01 m3 of steam at 200°C. The mass of the frictionless piston is such that it maintains a constant pressure of 500 kPa inside. Now steam at 1 MPa...
See AnswerQ: Water enters the constant 130-mm inside-diameter tubes of
Water enters the constant 130-mm inside-diameter tubes of a boiler at 7 MPa and 65°C and leaves the tubes at 6 MPa and 450°C with a velocity of 80 m/s. Calculate the velocity of the water at the tube...
See AnswerQ: A piston–cylinder device initially contains 0.6 kg of
A piston–cylinder device initially contains 0.6 kg of steam with a volume of 0.1 m3. The mass of the piston is such that it maintains a constant pressure of 800 kPa. The cylinder is...
See AnswerQ: The weighted piston of the device shown in Fig. P6–
The weighted piston of the device shown in Fig. P6–121E maintains the pressure of the piston cylinder contents at 200 psia. Initially, this system contains no mass. The valve is now...
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