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why does cut lemon float but cut lime sink ? Answered

Working in a bar I was cutting up fruit to go in the drinks. We always put it in soda water to keep it moist but last night i noticed that the lemon slices floated but the lime sank, why ?

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skyisblu (author)2009-11-03

I believe it has something to do with the amount of pith(the white part under the skin)on a lemon compared to a lime. Lemons generally have a lot more pith than limes, and given the spongy quality of pith, it would certainly improve the buoyancy of lemons.

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Re-design (author)2009-10-26

They're not floating they're swimming.  Everyone knows limes can't swim.

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Kiteman (author)2009-10-25
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lemonie (author)Kiteman2009-10-25

As both are fluid-filled sour citrus fruits, it's not quite so simple. I'd say that the skin is thicker on a lemon, and it's that that contributes to overall buoyancy. Gas-lifting may have an effect (in soda water), but I wouldn't like to comment on that without running a test.

L

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