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A large furnace flue operating at 440 degree C was made from a steel containing 0.10% phosphorus as an impurity. After 2 years in service, specimens were removed from the flue and tested for fracture toughness. The value of K was 30 MN/m^-3/2, compared to 100 MN/m^-3/2 for new steel. Because of this, the flue had to be scrapped for safety reasons. Explain this dramatic drop in toughness.
we have a laminar fully developed channel flow of water with density 1000 kgm3 and kinematic viscosity 1.3x10-6 m2s.
an engine operates on an ideal cold air-standard otto cycle with a compression ratio of 8 r v1v2. heat transfer to the
heat transfer from a certain stationary system occurs at a rate of 50 kw. if the system performs work at a rate of 41
The structural engineering design section within the engineering department of a regional electrical utility corporation has developed several standard designs for a group of similar transmission line towers.
The composite shaft consists of three sections: 1) a solid brass core, 2) a middle steel tube, and 3) an outer aluminium tube. The brass core (Gb= 39 GPa) has a diameter of 50 mm. The steel tube (Gs= 77 GPa) has an inner diameter of 50 mm and an ou..
consider the steady operation of a different self-contained refrigeration package for a shipping container. the device
Water initially exists as a saturated liquid at 186oC is contained in a piston-cylinder assembly. The water undergoes a process to the corresponding saturated vapor state, during which the piston moves freely in the cylinder. There is no heat transfe..
Determine the mass flow rate per unit frontal area. Assuming the flow is isentropic, calculate the exit Mach number and the static pressure ratio across the cascade.
a massive precisely machined 6-ft-diameter granite sphere rests upon a 4-ft diameter cylindrical pedestal as shown in
What is a beam? What factors determine the maximum load that it can take without failure?
A heat engine (HE) of 35 % thermal efficiency is used to drive a refrigerator having a COP of 4 , what is the heat input into the engine for each MJ removed from the cold body by the refrigerator? If this system is used as a heat pump, how many MJ of..
The vertical distance above the centerline of the pump inlet to the point of free discharge or surface level
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