Determine the available column strength of a 10 ft. long WT7x34 (A992) that is braced laterally and torsionally at the ends only, by considering (i) flexural, (ii) torsional, (iii) flexural-torsional buckling. This is a singly symmetric section so for (iii), you can follow Section E4(b) in the Specification.

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Fluids at rest possess no flow energy. a)- true b)- false

Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.