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On a cold winter's day, it is 30°F outside. Yet, the temperature of the outside surface of the mechanical engineering building is just slightly warmer by 3°F. Assume that the thickness of the building wall is 12 in., its thermal conductivity is 0.4 Btu/h-ft-R, and the convective heat transfer coefficient between the outer wall surface and the ambient air is 6 Btu/h-ft2-R. What is the temperature (°F) on the inside wall of the building?
The roof is supported by cables. If the cables exert FAB = 100N and FAC = 120N on the wall hook at A, determine the magnitude of the resultant force acting at A.
calculate the mass of mixture produced at the mixing stage, the mass jam produced from the kettle and the mass od water evaporated from the kettle.
Important information about Overall Heat Transfer Coefficient A copper sphere of internal diameter 2 m and wall thickness 40 mm is insulated with 75 mm of expanded polystyrene
Examine the influence of the vibration on the grain size, microstructure and mechanical properties of aluminium-silicon alloys (Al-Si) during solidification.
compute the number of kilograms of hydrogen that pass per hour through a 5-mm thick sheet of palladium having an area
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..
Hollow shaft transmitting power with shear limits. Design a hollow steel shaft to transmit 300 hp at 75 rpm without exceeding a shear tress of 8000 psi. Use 1.2:1 as the ratio of the outside diameter to the inside diameter.
The total time it takes to fall is 37 seconds. Find the horizontal lead to hit the target.
Also determine the axial force and deformation of the diameter due to temperature rise. Let E = 120 GPa and Co-efficient of linear thermal expansion = 0.0000168 per °C.
If the pipe is to be insulated with glass wool insulation (k=.05 W/m C) in order to decrease the temperature rise of water to .25 degrees C, determine the required thickness of the insulation.
consider an ideal simple gas turbine cycle. for a net power output of 10000 horse power an inlet air temperature of
Two kilograms of air within a piston-cylinder assembly execute a carnot power cycle with maximum and minimum temperatures of 750k and 300k, respectively.
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