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A patient with a knee injury says she feels weightless in a brine pool. A physiotherapist says the patient is not actually weightless, but the salt in the water provides additional buoyancy to support the patient's weight on her injured knee.
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First broadcast:
17 May 2007

Classroom Ideas

This idea could be tested experimentally within the class by using tap water and a salt water solution. A simple compare and contrast experiment could be carried out. A variety of materials could be placed into the water to see if the salt solution rather than the tap water allows them to float.

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