Suppose a person weighing 530 Newtons is floating in a salt lake (concentration

Question

Suppose a person weighing 530 Newtons is floating in a salt lake (concentration of 20% NaCl) with a specific gravity of 1.148. How much less of the person's body would be in the salt water as compared to if he were floating in ordinary water (w/ density 1.00g/cm^3)? If you give an answer, please explain in as much detail as possible with your logic. One answer people keep giving me is that the weight lost is equal to the difference in specific gravities multiplied by the original weight. 5 stars if you can elaborate.

Explanation / Answer

please go through this it may helps you
http://www.physicsforums.com/showthread.php?t=664573

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