A parachute designer is task with designing a round parachute for a human that weighs 160 lbs. The user wants to descend at a rate of 4.5
meters per second. Given that the coefficient of drag is .75 and the
air density is 1.22 kilograms per cubic meter. What is the area in
meters squared of the parachute that the designer will have to
construct?

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false

Burgers vector is generally parallel to the dislocation line. a)-true b)-false

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.