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the specific gravity of ethanol (booze) is 0.791, the specific gravity of ice is 0.915.

0.791/0.915 = 86.4%

alcohol that is 86.4% or greater should sink icecubes

(not sure this is right, the math that is...)

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12y ago
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4y ago

We'll assume the drink in question is some percent ethanol, and the rest is water.

Density of cold water = 1000 kg/m^3

Density of ethanol = 787 kg/m^3

Density of ice = 917 kg/m^3

We'll call A the ethanol portion of the drink, and B the water portion.

A + B = 1, so B = 1-A

For the ice to sink, it has to have a greater density than the average density of the beverage.

A*(ethanol density) + B*(water density) = (ice density)

A*(787) + (1-A)*(1000) = 917

Solving for A gives 0.3896, or 39% alcohol.

Remember, this is just for alcohol and water (which doesn't make for a very tasty drink). Most chemicals in hard beverages are more dense than water, making the ice more likely to float.

TLDR; 39% at the very least, but it depends on the drink.

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Q: What percentage alcohol for ice to sink?
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