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13 Dec 2009 11:08:28 IST

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Fluids: why is it easier to swim in sea water than in fresh water?.......a glass of water has an ice

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Fluids: why is it easier to swim in sea water than in fresh water?.......a glass of water has an ice cube floating in water the water level just touches the rim of the glass...will the water flow when ice melts?

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Killer Kiran

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13 Dec 2009 11:50:46 IST

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the answer to the 2nd part is that the level wont change as the ice wud hav displaced an equal amt of water wen it was floating.. so wen it melts it just occupies the place of wat it had displaced.. PS:thinking over the 1st part.....

Akshay

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13 Dec 2009 11:52:08 IST

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It is easier to swim in sea water than in fresh water because the density of sea water is more than that of fresh water (due to dissolved salts). So it is much more easier to float on sea water.

No, the water would not overflow because volume of ice is more than that of water (liquid). So after melting the level of water will drop down.

Killer Kiran

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13 Dec 2009 11:53:29 IST

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Salt water is denser and, therefore, more buoyant than fresh water so less of your energy is expended keeping afloat, and more is used to propel you along.

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