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A polymer is subjected to a cyclic stress of 5 MPa at a frequency of 1 Hz for 1 min. The phase angle is 0.05?. Calculate the temperature rise assuming no loss to the surroundings. E = 2GPa, C = 1.0 J/kg · K, and ρ = 1.0 Mg/m3.
The tank cover is airtight, and the pressure above the water surface is 2 atm gage. The system is at sea level. Determine the max height to which the water stream could rise.
The velocity ?eld in a ?uid ?ow is given by V ¼ 2yi þ xj þ tk: Determine the magnitudes of the acceleration, the angular velocity, and the vorticity at the point (2, 1, 21) at t ¼ 4 s.
Drip irrigation is a means of getting water directly to growing plants with very little waste. One method uses a large-diameter polyethylene "mother" tube (10-15 mm i.d.) from which lead many small diameter polyethylene feeder tubes, called drippers,..
An insulated piston-cylinder device contains 7L of saturated liquid water at a constant pressure of 175 kPa. Water is stirred by a paddle wheel while a current of 6.2A flows for 75 min through a resistor placed in the water. If one half of the liquid..
The interior of a building is maintained at 23oC by a heat pump cycle operating at steady state while receiving thermal energy from well water at 12oC. The thermal energy discharged to the building is at a rate of 116, 250 kJ/h.
A cylinder with a 0.3 m inner diameter and 0.4 m outer diameter is internally pressurized to 140 MPa. Determine the maximum shear stress at the outer surface of the cylinder.
after pumping stops and a new equilibrium is reached the tire pressure is 600 kp a and the air temperature in the tire
the automobile has a speed of 80 fts at point a and anacceleration a having a magnitude of 10fts2 acting in the
a layer of ice is placed on a flat hot surface with a constant temperature of 70 degc. the initial layer thickness is
an aircraft flying at 10000 feet uses a pitot-static tube to measure speed. the instrumentation on the aircraft
A. Steam enters well-insulated turbine at 7000 kPa, 600°C, with a velocity of 288 kph and leaves the turbine at 50 kPa and 150°C, at a velocity of 504 kph. The power output of the turbine is 6600 kW. Air enters an adiabatic nozzle at 45 psia and 940..
a gas turbine engine has a pressure ratio of 9.2 to 1 and operates on an ideal brayton cycle. assume air enters at 25 c
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