Determine the heat transfer per unit area for pool boiling water at 200 kPa and where the surface temperature of the container is 135ºC. Compare results using Equation 10-4 to those using Equation 10-6. Assume a surface tension of 45 mN/m for water at 200 kPa.
What will be an ideal response?
The following calculations were done with Mathcad:
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A composite beam is made up of a 90 mm 3 160 mm wood beam (Ew 5 11 GPa) and a steel bottom cover plate (90 mm 3 8 mm, Es 5 190 GPa). Allowable stresses in wood and steel are 6.5 MPa and 110 MPa, respectively. The allowable bending moment about the z axis of the composite beam is most nearly:
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