A certain oil with a density of 780 kg/m^3 is flowing inside a pipe at a flow rate of 8 L/s and passes through a section of 8.0 cm in diameter. a) What is the speed at which the oil flows? Hint; convert the units of the flow rate to m^3/s

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