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The average heat evolved by the oxidation of foodstuffs in an average adult per hour per kilogram of body weight is 7.20 kJ kg-1 hr-1. Assume the weight of an average adult is 62.0 kg. Suppose the total heat evolved by this oxidation is transferred into the surroundings over a period lasting one week. Calculate the entropy change of the surroundings associated with this heat transfer. Assume the surroundings are at T = 293 K.
the following impedance spectra were acquired at 270 c closed circles and 25 c open circles for nasicon a na solid
A sheet of epoxy reinforced with 60% unidirectional E-glass fibers, where x is the fiber direction. Strains ex= 0.0030, ey=-0.0020, and yxy = .0025 are measured. Estimate the applied stress ox, oy, txy
an air conditioner operating at steady-state takes in moist air at 27 oc 1 bar and 70 relative humidity. the moist air
Develop an expression for the temperature distribu- tion T(r) in the sphere wall in terms of q2", Ts,1, r1,r2, and the thermal conductivity of the wall material k.
Why do we often want to create the correct preload in the bolts when we assemble a joint? Under what conditions is correct preload relatively unimportant?
a flow of 30.5 kgmin of water from a hot water tank at 51oc is mixed with a 29.1 kgmin flow of 20oc water. determine
a gas turbine assume ideal brayton cycle has a pressure ratio of 10. it is connected to an electric generator with an
On the basis of air-standard analysis, calculate: 1) the rate of heat addition, in Btu/h. 2) the pressure at the turbine exit, in psi. 3) the compressor power input, in Btu/h. 4) the velocity at the nozzle exit, in ft/s.
A steel rod of circular cross section will be used to carry an axial load of 91 kips. The maximum stresses in the rod must be limited to 28 ksi in tension and 10 ksi in shear. Determine the required diameter for the rod.
in a standard tensile test a steel rod of 22-mm diameter is subjected to a tension force of 75 kn. knowing that
ateam at 5 bar 320 c enters a steady state turbine with a volumetric flow rate of 0.65m3s and evpands adiabatically to
Design a symmetric graphite/epoxy cross-ply sublaminate such that the thermal expansion coefficient in the x-direction is zero.
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