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what is capillarity?
in case of 'water' why capillary rise & in case of 'Hg' why
capillary depression
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Answer Posted / ab_ina7
capillarity is the rise or fall of liquid inside the capillary tube (dia less than 5mm).. when it is dipped in water a vaccum is created, due to adhesive force between water and tube molecules water rises in it and when pressure due to height of water is equal to atmospheric pressure it stops...
when tube is dipped in mercury then due to large cohesive force (than adhesive) pressure acts in opposite direction an there is dipression
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