Experiment of the buoyancy of water, Science

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Another way to observe the buoyancy of water

Push a large cork to the bottom of a pail of water. Notice the quantity of force you have to apply to hold the cork at the bottom. Repeat the experiment using a fairly large empty bottle stopped with a cork. Is there any dissimilarity in the force needed?

Blow up a toy balloon and push it to the bottom of the pail. How does the force to hold it down compare with the force needed for the cork and bottle?

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