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if your using water you put in say 50 ml of water in a graduated cylender. then you take a piece of foil, measure its length and width. then you put the foil totally into the 50 ml of water and measure the amount the water takes up say it goes to 51 ml from 50 ml.

a milliter is equal to 1 cm3 so you use the formula for the volume of a cube

V=Length x Width x Height

and plug in the data you've found say you measured length and width as 2 cm each

1 cm3= 2 cm x 2 cm x thickness

then you divide each side so thickness is alone

1cm3/2cm/2cm= .25 cm = thickness

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The math above is right, but the implementation is tricky. Foil is a lot thinner than 0.25 cm, so the accuracy of any answer by this method would be suspect. You would need a lot more foil than just 2 cm x 2 cm in order to see a measurable increase in displaced volume. Also, there's the problem of making sure there are no air bubbles adhering to the foil.

One way to improve accuracy by this method is to take many small sheets of foil and compress them together, and then measure their displacement. Again, you have to be careful that there are no voids or air bubbles between layers.

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13y ago

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