Gravitational force is required for

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(A) Natural convection occurs due to the difference in density between two regions of a fluid. When a fluid is heated,it expands and its density decre

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Convection

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(A) Natural convection occurs due to the difference in density between two regions of a fluid. When a fluid is heated,it expands and its density decreases,causing it to rise,while cooler,denser fluid sinks to take its place. This movement is driven by the gravitational force acting on the density gradient. Therefore,gravitational force is essential for natural convection.

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