a body weighs 200N in air and 120N .when completely immersed in an overflow jar filled with water till its spout what is the buoyancy on the body
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Specific gravity is Weight of the item (in air) / Weight of water displaced when the item is placed in water = the weight in air/(weight in air - weight in water)
200N/(200N - 120N) = 200N/80N = 100/40 = 10/4 = 5/2 = 2.5 (which incidentally is quite possible for a stone. The person who asked the question came up with reasonably realistic numbers).
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