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That is imposible

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Thank you. Now go to your room and study your spelling and punctuation lesson.

What we need is a solid with a density less than 1 gm/cm3, and then

an oil with a density less than that of the solid we found.

Here are a couple of solids that float on water:

-- Paraffin wax . . . 0.8 to 0.9

-- Sodium . . . 0.968

The question doesn't specify a particular type of oil. Here are a few I found

that are lighter than water, paraffin, and sodium, along with their densities:

-- Crude, 48° API . . . . 0.79

-- Crude, Texas . . . . 0.873

-- Vehicle gasoline . . 0.737

-- Kerosene . . . . . . 0.817

-- Olive oil . . . . . . . 0.80 to 0.92

If you add any of these liquids to a tall glass of water, they will float on top of it,

and a lump of paraffin or sodium will float at the level where the oil and water meet.

(Don't try this at home, at least not with sodium !)

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