A continuous and aligned fiber-reinforced composite is to be produced consisting of 55 vol% aramid fibers and a 45 vol% polycarbonate matrix. The tensile strength of the aramid fiber is 3600 MPa, and the stress on the polycarbonate matrix when the composite fails is 55 MPa. Calculate the longitudinal strength of the composite. Round and report answer to 2 significant figures and in units of GPa in the format: 1.2 GPa

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.