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Archimedes principle

If an object is weighed in air and then in a liquid there is a difference between the readings. This is due to the upthrust of the liquid on the object. For this reason the upthrust is often called the loss in weight of the object.

Archimedes principle:

When a body is partly or totally immersed in a fluid there is an upthrust that is equal to the weight of fluid displaced.

Upthrust = apparent loss of weight of object = weight in air - weight in liquid

© Keith Gibbs 2009