Question

2. What do you mean by buoyancy?
3. Why does an object float or sink when placed on the surface of water?
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Answer 1

Answer:

the power to float or rise in a fluid; relative lightness. the power of supporting a body so that it floats; upward pressure exerted by the fluid in which a body is immersed. lightness or resilience of spirit; cheerfulness

* An object sinks in water if its density is greater than that of water. * An object floats in water if its density is less than that of water.