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water rises in the height of 10 cm in capillry tube and mercury falls to a depth of 3.112 cm in the same capillary tube If the density of mercury is 13.6gm/cc and the angle of contact for mercury is 135 degree then ratio surface tension of water and mercury is

pallavi pradeep bhardwaj , 16 Years ago

Grade 12

1 Answers

askiitiansexpert soumyajit_iitkanpur

Let a liquid of density ρ rise a height h in a capillary of raduis r, then we can write

hrρg = 2Tcosθ

where T is surface tension of that liquid and θ is angle of contact.

Let T_m and T_w be the surface tension of water and mercury.

T_m/T_{w = [(3.112 * 13.6)/(10 * 1)] * [cos}θ_{w / cos(135⁰)] (}θw is the angle of contact of water₎

= 5.98*cosθ_w

Last Activity: 16 Years ago

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Mechanics> que-5...

water rises in the height of 10 cm in capillry tube and mercury falls to a depth of 3.112 cm in the same capillary tube If the density of mercury is 13.6gm/cc and the angle of contact for mercury is 135 degree then ratio surface tension of water and mercury is

pallavi pradeep bhardwaj , 16 Years ago

askiitiansexpert soumyajit_iitkanpur

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