A rectangular watertight box (of treasure) is 660mm long. 520mm wide and 310mm deep. It weighs 323N. A) If it floats with its sides and ends vertical in water of density 1030kg/?3 what depth of box will be submerged. B) If the box is held completely submerged in the water of density 1030kg/m2, by a vertical chain attached to the underside of the box, what is the force on the chain? Determine unknown forces by applying D'Alembert's principle to a free body diagram

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