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With the help of a kitchen knife, carefully cut a potato into two pieces of roughly equal size.
Put one piece of the potato in Beaker A with plain water.
Put the other piece of the potato in Beaker B with 20 per cent salt or sugar solution.
Leave them undisturbed for about an hour or until you notice a visible change in the size of the pieces.
Measure and record the final weight of each piece.
Calculate the difference between the initial and their final weights.
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