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A 2-in.-diameter bar of 4320 steel is to have a hardness of at least HRC 35. What is the minimum severity of the quench (H coefficient)? What type of quenching medium would you recommend to produce the desired hardness with the least chance of quench cracking?
A rocket works with maximum overall efficiency when air-craft velocity is __________ the jet velocity.
cast aluminum products often contain gas porosity and shrinkage cavities which can undermine the integrity of these
A spring-loaded piston-cylinder device is initially filled with 0.13 lbm of an R-134a liquid-vapor mixture whose temperature is ?30°F and whose quality is 80 percent. The spring constant in the spring force relation F = kx is 37 lbf/in, and the pisto..
1 the barometric pressure is reported to be 605.5 torr and the temperature of the water is 22.5 c what is the pressure
a heat pump uses a 100000 gallon swimming pool as a heat source in the winter. when the heat pump is running at full
A mass of 20 kg is suspended from a spring of stiffness 10,000 N/m. The vertical motion of the mass is subject to Coulomb friction of magnitude 50 N.
it has been determined that a point in a load-carrying member is subjected to the following stress condition sx 400 mpa
If the exchanger were operated in counterflow with the same overall coefficient and inlet temperatures, what would be the reduction in the required length relative to the value found in part (a)?
assuming a znd structure determine the key properties for the detonation wave described in problem 1. propagating
a gaseous fuel has the following volumetric analysis 90 methane ch4 5.0 ethane c2h6 and 5nitrogen. it bums in a steam
Calculate the net work done per cycle for each case and then plot the thermal efficiency against? on the same plot for each the four values of? Explain why there is an optimum?
water initially saturated vapor at 4 bar fills a closed rigid container. the water is heated until its temperature is
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