A 227-kg block of cement, of density 2.8 x 10^3 kg/m^3, rests on a pedestal in front of the Al Capone Memorial Library. How much did it weigh submerged, while being hauled out of the river (freshwater)?
First, we calculate the volume of the block, which is: V = 227/(2.8 x ...
The answer is determined by looking at the volume of the block being submerged, and its gravitational pull. Then, the effect of gravity when this block is hauled out of the river, will establish the block's weight.