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It depends on the density of the object that weighs one pound, and how much of it is under water. The object will weight 1lb - water density * object volume under water; If the object is on average is less dense the water (i.e. is buoyant), and is allowed to swim, its weight will be 0 because proportion of its volume under water will compensate gravity exactly.

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13y ago
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15y ago

They would weigh the same.

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Q: How much would someone weigh under water?
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When an object is submerged will it weigh less or have less mass?

Objects under water seem to weigh less but they have the same mass as they would out of water.


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