One example of the buoyancy concept is the cola can experiment. If you take an aluminum can of cola and place it in a bucket of water, it will sink. However, if you pour out all the cola from the aluminum can and then place it in a bucket of water, it will float. The combined effect of a filled cola can brings the density to a higher level, hence it sinks. Another experiment can be tried at home. Get some ice from the freezer and see if it floats. Normally, you would think that a block of ice would not float. After all, it is made from water. Will water float on water? But a block of ice will float since the density frozen of water is actually lower than when it's in liquid from.
One example of the buoyancy concept is the cola can experiment. If you take an aluminum can of cola and place it in a bucket of water, it will sink. However, if you pour out all the cola from the aluminum can and then place it in a bucket of water, it will float. The combined effect of a filled cola can brings the density to a higher level, hence it sinks. Another experiment can be tried at home. Get some ice from the freezer and see if it floats. Normally, you would think that a block of ice would not float. After all, it is made from water. Will water float on water? But a block of ice will float since the density frozen of water is actually lower than when it's in liquid from.
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