Mercury mental is poured into a graduated cylinder that holds exactly 22.5ml. The mercury used to fill the cylinder weighs 20.0g. Use this information to calculate the density of mercury.

Panel bc in fig. p2.76 is semi-circular, with the 3 meter radius and horizontal straight edge through point b. compute (a) the hydrostatic force of the water on the panel, (b) its center of pressure, and (c) the moment of this force about point b. assume atmospheric pressure on the dry side of the panel