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Consider an engine cover that is made with two layers of metal plates. The inner layer is stainless steel (k1 = 14 W/m*k) with a thickness of 10 mm, and the outer layer is aluminum (k2 = 237 W/m*K) with a thickness of 5 mm. Both metal plates have a surface roughness of about 23 micrometers. The aluminum plate is attached on the stainless steel plate by screws that exert an average pressure of 20 MPa at the interface. The inside stainless steel surface of the cover is exposed to heat from the engine with a convection heat transfer coefficient of 10 W/m^2*K at an ambient temperature of150 degrees C. The outside aluminum surface is exposed to a convection heat transfer coefficient of 25 W/m^2*K at an ambient temperature of 40 degrees C. Determine the heat flux through the engine cover.
an ideal gas carnot cycle with air in a piston cylinder has a high temperature of 1200 k and a heat rejection at 400 k.
A 1 m diameter cylindrical container with hemispherical ends is used to transport gas. The internal pressure is 5 MPa and the safety factor is 2. Using the MSST determine the container thickness. The Material is such that E = 200 GPa, Sy = 430 MPa an..
A piston-cylinder assembly undergoes a cycle consisting of the following three processes: Compression with constant internal energy. Constant-pressure expansion with W_3-1=12.5 kJ
a horizontal 500 lb force performs at a point d of crankshaft ab which is held in static equilibrium by a twisting
a spur gear reducer has an 18-tooth pinion driven 1500 rpm by an electric motor and a 36-tooth gear that drives a load
Determine the stress in a stay at a given temperature. A steel 'stay' of effective length 5m is fitted in between the walls of a ships refrigerated compartment when the temperature is 18 degrees centigrade.
a pipe system carried a steam-water mixture at 250psi 95 quality. a leak develops in the pipe allowing fluid to escape
A 20-mm diameter rod made of a ductile material with a yield strength of 350 MPa is subjected to torque of 100 N.m and a bending moment of 150 N.m. An axial force is then gradually applied. Determine the value of force when the rod begins to yield..
A bird flying at a constant speed at an altitude 100 m is being tracked by a person located directly below the line of flight. If this angle is decreasing at 0.02 rad/s when the angle between the horizon line and the line of site is 45 degrees.
the central cubical area of an office building at sea level has a floor area of 4000 ft2 and is occupied by 30 people
air at 110 kpa and 50 c flows upward through a 6-cm-diamter inclined duct at a rate of 45 ls. the duct diameter is then
johnson implants is planning a new online patient diagnostics for surgeons while they operate. the new system will cost
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