Which of the following methods of flow of heat is (are) based on gravitational attraction?

Conduction

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Convection

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Radiation

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All of these

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Solution

The correct option is B Convection
Convectional currents that are set up in vessels having considerable height, work on the principle that cooler, denser water tries to move downwards on account of its larger weight while the water closer to the heater i.e. the water at lower height gets heated up and tries to move upwards on account of lower weight.

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Similar questions

On what principle of the following methods of separation based give one example of a mixture for each of the methods mentioned in which they are used

A. Sublimation,and

B. Chromatography

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