Question

Water rises to height of a 2.5cm in Capillary tube of diameter 1mm find Surface tension if d=1000kg/m3​

Answer 1

Answer:

Given :

Radius of capillary tube = 0.1mm

Surface tension of water = 7x10-2 N/m

Angle of contact = 0° • Density of water = 1000kg/m

Acceleration due to gravity = 9.8m/s T

To find:

Height of water column inside the capillary tube.

Formula:

When a capillary tube of radius 'r' is dipped in a liquid of density p and surface tension T, the liquid rises or falls through a distance,

H=

ρgr

2Tcosθ

=

1000×9.8×0.1×10

−3

2×7×10

−2

×cosθ

=0.142m

Explanation:

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