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Consider the following fluids at a film temperature of 300 K in parallel flow over a flat plate with velocity of 1 m/s: atmospheric air, water, engine oil, and mercury.
(a) For each fluid, determine the velocity and thermal boundary layer thicknesses at a distance of 40 mm from the leading edge.
(b) For each of the prescribed fluids and on the same coordinates, plot the boundary layer thicknesses as a function of distance from the leading edge to a plate length of 40 mm.
a belt pulley is fastened to a 75 mm shaft running at 360 rpm by means of a key 18 mm wide and 125 mm long. the
A Turbine develops 40,000KW power by running at a speed of 150 rpm at a head of 25 m. The discharge required is 150m^3/s. If the head of the turbine is reduced to 20 m. Predict the performance of turbine?
A piston cylinder device contains .733 kg of refrigerant-134a at -10 degrees C. The piston that is free to move has a mass of 8.63 kg and a diameter of 21.2 cm. The local atmospheric pessure is 88 kPa. Now, heat is transferred to the refridgerant-134..
Sketch the frequency response of the system. Overlay the frequency spectrum of the excitation and as you start the system up, increasing Ω from 0 to 60 rpm, what speeds are most likely to excite large amplitude response? Why?
a first-order system is subjected to a harmonic input of 3hz. the system has a time constant of 0.5s. calculate the
Refrigerant-134a enters the condenser of a residential heat pump at 900 kPa and 40°C at a rate of 0.02 kg/s and leaves at 900 kPa as a saturated liquid. If the compressor consumes 1.2kW of power, determine (a) the COP of the heat pump and (b) the ra..
Two kilograms of water initially at 160°C and x = 0.65 undergo an isothermal internally reversible compression to 1.0 MPa. Determine the heat transfer, in kJ. the work, in kJ.
a sample of wet silty clay soil has a mass of 126 kg. the following data were obtained from laboratory tests on the
Calculate the force required in direct extrusion of 1100-O aluminum from a diameter of 6 in. to 2 in. Assume that the redundant work is 30% of the ideal work of deformation, and the friction work is 25% of the total work of deformation.
a rocket launched vertically upward is being monitored by a radar located at a distance 1.2 km from the launch pad. the
5 lbm of air is compressed in a piston cylinder assembly from 1 bar 300k to 5 bar according to a polytropic process
a closed and rigid tank with 1.5 m3 volume initially contains saturated vapor refrigerant 134a at 50deg c. the system
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