A 18.0cm15.0cm12.0cm magnesium casting is An aluminum alloy containing 4.5%Cu is to be poured into produced. After cooling to room temperature, the a sand mold with the inner dimensions of 101030cm. casting is found to weigh 5420g. a) How large a shrinkage cavity could form inside the mold? Determine b) What would be the final size and volume of the casting a) the volume of the shrinkage cavity at the center of after cooling to the room temperature? the casting b) the percent shrinkage that must have occurred Assume that feeding is prevented just after mold filling. during solidification It is known that the solidification shrinkage of this alloy is 6.3% by volume and its volumetric solid contraction due to The density of the solid magnesium is 1.74g/cm3 cooling is 5.3%