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Air enters the duct of an air-conditioning system at 15 psia and 50F at a volume flow rate of 450 ft^3/min. The diameter of the duct is 10 inches and heat is transferred to the air in the duct from
Sketch the cycle on P-v and T-v diagram. Label the states, show property values, and indicate appropriate lines of constant temperature or pressure.
What is the stress intensity factor KI at the tip of a 2-mm-deep longitudinal crack along a six-inch Schedule 40 steel pipe pressurized to 1000 psig? Disregard component geometry (Y=1).
A line containing nitrogen, at 540oR and 75 psi is connected to a turbine that exhausts to an initially empty, closed,, 2000 ft3 tank. The turbine operates to a tank pressure of 75 psi, at which poi
A 45 kg machine is mounted on a spring of stiffness 8E5 N/m. When the machine operates at 32 Hz, the machine's steady state amplitude is measure as 1.5 mm.
Calculate the angular velocity and angular acceleration of a 2kg mass rotating in a horizontal circle of 2m radius if one revolution takes 4 seconds.
Two small metal spheres with masses 2.0 g and 4.0 g are tiedtogether by a 5.20 -long massless string and are at rest on africtionless surface. Each is charged to 2.20
As part of a pollution study, a model concentration c as a function of position x has been developed. At what location will the sensor indicate the most rapid rate of change, and what is the value of
Although the Hume-Rothery rules apply strictly only to metals, the concept of similarity of cations corresponds to the complete solubility of NiO in MgO.
Getting heat from a hot source that is 100 kPa steam going from saturated vapor to a saturated liquid 1Mw of power is produced.
There are no significant changes in kinetic or potential energy. Determine the net work of the cycle, in kJ, and the heat transfer for process 2-3, in kJ. Is this a power cycle or a refrigeration cy
A square duct, 30 cm x 30 cm, is maintained at a constant temperature of 30 °C. Calculate the heat gained by the duct in W/m.
Steam at 40?C condenses on the outside of a 5-m-long, 3-cm-diameter thin horizontal copper tube by cooling water that enters the tube at 25?C at an average velocity of 2 m/s and leaves at 35?C. Det
What is the void fraction if the cubes are replaced with cylinders that have a diameter 0.02 m and a height 0.02 m, all other parameters remaining the same?
Air at 15 °C and atmospheric pressure is forced over the outside of the tube at a velocity of 15 m/s in a direction normal to the axis of the tube. What is the heat loss per length of tube in W/
Steam enters an adiabatic turbine at 2 MPa, 300C and exits at 50 kPa. The mass flow rate through the turbine is 2 kg/s, and the turbine produces a power output of 1350 kW.
Find the amount of pollutant in Tank A as a function of time, x(t). Tank B initially contains 200 gallons of pure water. Find the amount of pollutant in Tank B as a function of time, x(t).
A dam in western North Carolina takes a 30 m3 /s flow of water from the Nantahala river and diverts it to a turbine through a 2 m diameter pipe. The elevation drop from the inlet to the exit is 300m
A centerfielder throws a baseball 250 ft from the back wall to second base. It takes 2.84 seconds to reach the base. How high did it get, and at what angle was it originally thrown? (Neglect height
When operating it is necessary to limit the vibration amplitude at resonance to 0.25mm by fitting a viscous damping device in the suspension. Calculate the damping coefficient required.
A wall of thickness 0.1 m and thermal conductivity 25 W/mK having uniform volumetric generation of 0.3 MW/m^3 is insulated on one side, while the other side is exposed to a fluid at 92 degrees C.
A wind tunnel is 6m long and has a cross section of 1m^2. Air flows through at 70m/s at standard sea-level conditions (density = 1.225 kg/m^3, mu = 1.7894E-05). At what angle should the walls diverg
1.Tensile tests were done on a steel bar, an aluminum bar and a plastic bar. The bars all had a diameter of 0.505 inches. The initial length (Lo) for each was 2.000 inches.
Find the elapsed time to vaporize the propane and total work produced. Also find theoretically maximum possible total work output for the given QCOLD, WREV,MAX.
Two dimensional, steady state conduction occurs in a hollow cylindrical solid of thermal conductivity k= 16w/mk outer r - 1m, length 2z0=5m, where the origin of the coordinate systerm is located at