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The strength of titanium alloy is found to be 450 MPa when the grain size is 17 x 10-6 m and 565 MPa when the grain size is 0.8 x 10-6 m. Determine the constants in the Hall-Petch equation and the strength of the titanium alloy when the grain size is reduced to 0.2 x 10-6 m.
a finned-tube heat exchanger has to be designed to transfer heat from the humidified hotair to cold water. it is
Calculate the minimal round-trip time delay for a radio communications link between Los Angeles and the satellite.
What strategies could be used to counteract the increased Nitric oxides emissions with ethanol blended petrol?
air at the inlet of an ideal reversible-aidabatic compressor enters through a 0.036m2 pipe at 115 kpa. the compressor
a grade 30 cast iron pressure vessel has a sealed head diamter of 20 inches. it uses ten 114 unf steel studs that are
the bar rotates in the horizontal plane about a smooth pin at the origin. the 2 kg sleeve a slides on the smooth bar
water flows in a long electrically heated tube with q constant constant heat flux. the velocity and temperature
Steam enters the turbine of a simple vapor power plant with a pressure of 160 bar and a temp of 560 C and expands adiabatically to 0.08 bar
in the production of ethanol from corn the solids left after fermentation are dried in a continuous-flow oven. this
the average atmospheric pressure in denver elevation 1610 m is 83.4 kp a. determine the temperature at which water
a concentric tube heat exchanger uses water which is available at 15?c to cool ethylene glycol from 100 to 60c. the
An ideal vapor-compression refrigeration system operates at steady state with Refrigerant 134a as the working fluid. Superheated vapor enters the compressor at 30 lbf/in2, 20F, and saturated liquid leaves the condenser at 140 lbf/in2. The refriger..
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