Use the coordinates of point x and the center C of the circle to determine the acute central angle. The other central angle is 180° minus the acute angle. For this Mohr’s circle, determine the magnitude of the central angle between: (a) point x and the point representing the principal stress σp1. (b) point x and the point representing the principal stress σp2.

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.