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Some alloys use a combination of strain hardening and precipitation hardening to achieve particularly high strength levels. The usual order of strengthening is solution treatment,quenching, cold working, and finally precipitation heat treatment. Why not reverse the order ofthe cold working and precipitation heat treatment steps
water enters an insulated nozzle operating under steady conditions at a pressure of 60 psia a temperature of 350 degf
a pressure transducer exhibits a temperature sensitivity of 0.05 units per degree celsius and a pressure sensitivity of
your friend a 75 kg mountain climber is suspended from a cliff by a rope. calculate the tension in the rope in newtons
water at 300 kpa with a quality of 50 has a temperature raised 20oc in a constant pressure process. what is the new
A pitot-Static tube is placed in a subsonic air flow. The static pressure and temperature in the flow are 80 kPa and 12 oC respectively. The difference between the pitot and static pressures are measured using a manometer and found to be 200 mm of me..
A gas within a piston-cylinder assembly executes a Carnot power cycle during which the isothermal expansion occurs at TH = 720 K and the isothermal compression occurs at TC = 340 K. Determine: (a) the thermal efficiency (b) the percent change in ther..
for a certain material failures were reported after 3000 hours at 650 c and 186 hours at 700 c when loaded at 250 mpa.
a piston cylinder has 1.5 kg of air at 300 kand 150 kpa. it is now heated up in a two step process. first constant
A Steam Generator is a type of heat exchanger in which hot exhaust gases (modeled as air) are used to heat saturated liquid water to produce steam. In this case hot exhaust gases enter a heat exchanger at 700 K and at a mass flow rate of 20 kg/s. Sat..
a heat engine consists of a compressor a turbine and two heat exchangers using air as the working fluid. the compressor
the wear resistance of a steel shaft is to be improved by nitrogen hardening of its surface. the initial nitrogen
Air contained in a rigid, insulated tank fitted with a paddle wheel, initially at 4 bar, 40oC and volume of 0.2 m3, is stirred until its temperature is 500 K. Assuming the ideal gas model for the air, determine the amount of entropy produced, in kJ/K..
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