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A thin-walled circular tube and a solid circular bar of the same material, the same cross-sectional area, and the same length are subjected to torsion. What is the ratio of the strain energy U1 in the tube to the strain energy U2 in the solid bar if the maximum shear stresses are the same in both cases?
liquid waterh2o at 200 kpa and 20oc is heated in a chmaber by mixing it with a steam h20 at 200 kpa and 150oc. the
a steel plate of 12-in outer diameter is fabricated from 14in thick plate by welding along a helix that forms an angle
a gasoline engine delivers 150 kw . the fuel used in c8h18 liq and it enters the engine at 25 c . 150 of theoretical
With justifications for your choice, identify any axes of symmetry or asymmetry in the model and describe in words the conditions you would apply at these boundaries to produce a reduced symmetry model with smaller geometry.
a power cycle operates between hot and cold reservoirs at 500k and 310k respectively. at steady state the cycle
a refrigeration system using r-22 as the working fluid has condenser and evaporator pressures of 250 psi and 30 psi
An air heater may be fabricated by coiling Nichrome wire and passing air in cross flow over the wire. Consider a heater fabricated from wire of diameter D=1 mm, L= 2m, electrical resistivity rho=10^-6 ohms, thermal conductivity k=25W/mK, and emiss..
Determine the gain error if the circuit is to provide a nominal gain of (a) 5, or (b) 50.
a portable heater is placed inside a laboratory chamber to maintain the inside air temperature of the chamber at
an air conditioner using r-134a as the working fluid and operating on the ideal vapor-compression refrigeration cycle
an n-type extrinsic semiconductor has an electron concentration of 5x1017 m-3. if the electron drift velocity is 350 ms
find max stress sigmatheta. the cylinder is hollow in the center one layer of steel inside and a layer of brass
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