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A large plastic casting with thermal diffusivity 6.0 x10^7 m2 /s is removed from its mold at a uniform temperature of 150 degrees C. The casting is then exposed to a high-velocity air stream such that the surface experiences a sudden change in temperature to 20 degrees C. Assuming the casting approximates a semi-infinite medium and using a finite-difference method with a space increment of 6mm, estimate the temperature at a distance of 18 mm from the surface after 3 min have elapsed.
the decarburization of a steel can be carried out by placing the steel in a vacuum i.e. the carbon concentration is
a steel railroad track es200 gpa as11.7x10-6oc was laid out at a temperature of 6oc. determine the normal stress in the
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boron is diffused into highly pure germanium at 1000oc q 105 kcalmol do 1.1 x 10 m2sec. a steady surface
Find the area of a semi-circle truncated at one end (on the flat side) by a length l. Express the area in terms of the radius R and l -- you can define additional variables in terms of R and l for neatness. Find the area with the hatched lines (the l..
the silver medal awarded to the second place winner in 2002 salt lake city winter olympics had a composition of 92.5 at
air at 3x10-4 kgs and 27o c enters a rectangular duct that is 1 m long and 4 mm by 16 mm on a side. a uniform heat flux
how would you use a pulley system with one rope to pull at a single item at two points simultaneously?the free ropes of
you have been asked to design a four-wheel drive vehicle capable of ascending a 24 degree ramp. what is the minimum
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