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Upward thrust

1) A loaded flat bottom barge floats in fresh water. The bottom of the barge is 4.06m below the water line. When the barge is empty the barge's bottom is only 1.36m below the water line. What is the difference between the pressure on the bottom of the loaded barge and the pressure at the water line? Answer in Pascals.

2) If the surface area of the bottom of the barge is 580m^2 what is the weight of the load in the barge? Answer in Newtons

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