What characteristic(s) do all magnets have? A. The magnetic field lines are strongest at the magnet's poles. The magnetic force repels "like" poles. C. Magnets always have a north and south pole. D. All of the above

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