1-For a saturated soil, unit weight = 122.5 lb/ft3, Gs = 2.70. Find the dry unit weight, void ratio, and water content 2-Saturated clay sample has Ws = 100 lb, and water content of 32%. Find the void ratio, total unit weight, dry unit weight. Gs = 2.70.

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.