Question

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what is called exerted by the liquid?​

Answer 1

Explanation:

When an object is placed in a fluid(liquid or gas), the difference in pressure acting on the top and bottom surface results in an upwards force equal to the weight of the fluid displaced by the object. This force is called 'buoyant force' or 'upthrust

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Answer 2

The force required for this action is a measure of the fluid's viscosity. The frictional force exerted by liquids is called viscous friction.