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We find that 10h are required to successfully carburize a batch of 500 steel gears at 900C,where the iron has the FCC structure.We find it costs $ 1000 per hour to operate the carburizing furnance at 900C and $1500 per hour to operate the furnace at 1000C. Is it economical to increase the carburizing temperature to 1000C? Justify your answer. The activation energy for difussion of C in Fe is 32,900 cal/mole and R is 1.987 cal/mol.K.
1.5 kg of ethane at 150 kpa 300k is heated in a two-step process using a source at 1600k. the first step is a constant
the velocity of a lift increases uniformly from zero to its maximum value at mid-height (1.4m) in 7.5s and then decreases uniformly to zero in 7.5s. The peak power output is 6kW when the velocity is maximum, determine the maximum lift force provid..
steam enters a 10000 hp turbine at 1600 lbfin2 and 1400 f and exits 10 lbfin2 and a quality of .9. the measured heat
Evaluate the variation of hoop stresses across the wall of the compound cylinder.
nitrogen is compressed in a polytropic process with n 1.2 from 120 kpa and 10oc to 800 kpa in a piston-cylinder
an airplane flies horizontally at 55.0 ms. its propellernbspdelivers 1500 n of thrust forward force to overcome
A heat pump with a COP (coefficient of performance) of 2.8 is used to heat an air-tight house. When running, the heat pump consumes 5 kW of power
the 3.25-kg collar shown below is attached to a spring and released from rest at a. the collar then travels downward a
a cylinder fitted with a piston has an initial volume of 2 ft3 and contains nitrogen at 20 lbfin2 at 80 f degrees. the
a sketch three-dimensional views of the unit cell of a b.c.c. crystal showing a 100 plane a 110 plane a 111 plane and a
a small water droplet of diameter d100 micro meter and temperature tmp 0 deg c falls on a nonwetting metal surface
What is the minimum energy in the conduction band, and where can it be found in the Brillouin zone?
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