Question

calculate the rise of water inside a clean glass
capillary tube of radius o. 1 mm, when immersed in
water of surface tension 7x10-² N/m 'The angle
of contact between water and glass is zero,
density of water 1000 kg/m³ = 9.8 m/s²​

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=ρgr2Tcosθ=1000×9.8×0.1×10−32×7×10−2×cosθ=0.142m