Q. When a brick put in to the water it absorbs water quickly. Identify the phenomenon behind this
Solution:
?The phenomenon of rising or falling of the liquid level in a capillary tube against the gravitational force is called capillarity
? The rise and fall of liquid in a capillary tube is called capillarity. Application is Oil rises in the long narrow spaces between the threads of the wick as they act as a capillary. Capillary rise is due to adhesion. An Example is water in a glass tube.
?A liquid that shows capillary falls is mercury
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