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1. Calculate the tensile stress in a wire 4 mm in diameter when it is subjected to an axial tensile force of 2,000 N.
2. Calculate the tensile stress in a metal rod with a cross section 0.5 in. by 2.5 in. if it is under a tensile force of 1,500 lb.
a heat pump operates on the ideal vapor compression refrigeration cycle with r-134a as the working fluid between the
Water flows in a 0.15-m-diameter vertical pipe at a rate of 0.20 m3/s and a pressure of 580 kPa at an elevation of 25 m. Determine (a) velocity head at elevation of 20 m, (b) pressure head at elevation of 20 m, (c) velocity head at elevation of 55 m,..
the man pulls the boy up to the tree limb by walking backward. if he starts from rest when 0 and moves backward with a
saturated water vapor at 200 kpa is expanded slowly and without friction i.e. internally reversibly and isothermally in
a one dimensional wall of material kw10wmk is 50 mm thick with uniform heat generation qlsquolsquolsquo5106wm3. the
Temperature profile given as T(y) = 20+80e-800y Determine heat transfer co-efficient at y=0, thermal conductivity, k=0.62W/mK
a piston-cylinder device contains 0.15kg of air initially at 2mpa and 350oc. the air is first expanded isothermally to
a refrigerator in a laboratory uses r-22 as the working substance. the high pressure is 1200 kpa the low pressure is
Determine the 28-day compressive strength of your concrete samples and determine the modulus of elasticity and Poisson's ratio.
a wall has inner and outer surface temperatures of 16c and 6c respectively. the interior and exterior air temperatures
a straight fin of rectangular profile has a thermal conductivity of 14 wm -oc thickness of 2.0 mm and length of 23 mm.
A spherical vessel used as a reactor for producing pharmaceuticals has a 5 - mm - thick stainless steel wall (k = 17 W/m middot K) and an inner diameter of D, = 1.0 m. During production, the vessel is filled with reactants for which p = 1100 kg/m3 an..
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