(a) calculate the moment at point "c", where point "c" is the square 3'' below the centroid (b) calculate the bending stress at the point "c" at 3 inches below the centroid

(c) given that the shear stress is 22.3 psi, draw a mohr's circle for the stress block

(d) prove the shear stress is 22.3 psi through calculating it

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.