Consider a single crystal of silver oriented such that a tensile stress is applied along a [001] direction. if slip occurs on a (111) plane and in a direction, and is initiated at an applied tensile stress of 1.1 mpa, compute the critical resolved shear stress.

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.