Calculate the density of paraffin oil, if glass capillary of diameter 0.25 mm dipped in paraffin oil of the surface tension `0.0245 N//m` rises a height of 4 cm. (angle of contact of paraffin oil with glass is `28^@` and `g=9.8m//s^2`)

Calculate the rise of water inside a clean glass capillary tube of radius 0.1 mm when immersed in water of surface tension 7 xx 10^-2N//m . The angle of contact between water and glass is zero, density of water = 1000 kg//m^3, g = 9.8 m//s^2

The excess pressure in a soap bubble of diameter 8 cm and surface tension 0.02 N/m, is

A capillary tube of radius 0.5 mm is dipped vertically in a liquid of surface tension 0.04 N/m and relative density 0.8 g/cc . Calcukate the height of capillary rise , if the angle of contact is 10^@ .

A capillary tube 0.14mm in diameter has its lower end immersed in a liquid of surface tension 0.054 N//m . If the density of a liquid is 860 kg//m^3 , find the height to which the liquid rises in the tube.(Angle of contract of liquid with glass is 28^@ and g=9.8 m//s^2 ).

A capillary tube of diameter 0.6 mm dipped vertically into water. It rises to height of 6 cm in capillary tube, find the surface tension of water. (Given: density of water = 1000 kg//m^3, g = 9.8 m//s^2 ).

When glass capillary tube of radius 0.4 mm is dipped into mercury, the level inside the capillary stands 1.24 cm lower than that outside. Calculate the surface tension of mercury. (Angle of contact of mercury with glass = 135^@ , g = 9.8 m//s^2 , density of mercury = 13.6 xx 10^3 kg//m^3 )

What is pressure due to surface tension in spherical drop of glycerin of diameter 2.8 mm? Surface tension of glycerin is 0.063 N//m?

The tube of a mercury barometer is 1 cm in diameter. What correction due to capillarity with effect of meniscus is to be applied to barometer reading if surface tension of mercury is 435.5 dyne/cm and angle of contact of mercury with glass is 140^@ ? (density of mercury = 13600 kg//m^3 )

A liquid of density 700 kg//m^3 rises to a height of 12 mm in capillary tube of 2.7 mm diameter. If angle of contact is 30^@ , find the surface tension of liquid, ( g = 9.8 m//s^2 )