Question

what do you mean by buoyancy ?​

Answer 1

HERE YOUR ANSWER:

Buoyancy:

The upward force exerted by fluids (liquid and gas) on objects when they are immersed in them is called buoyant force and the phenomenon is called buoyancy. Now to keep the object immersed we have to apply external force from upward direction to overcome buoyant force.

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hope it helps you..!!

Answer 2

Answer:

Buoyancy or upthrust, is an upward force exerted by a fluid that opposes the weight of an immersed object.

Explanation.

In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid. Thus the pressure at the bottom of a column of fluid is greater than at the top of the column