A capillary tube of length (i) `l = 60 cm`, (ii) `l = 50 cm` and radius `r = 1//4 mm` is immersed vertically into water. Find the capillary rise in both cases. Angle of contact `= 0^@`. Take coefficient of surface tension as `72 "dyne"//cm, g = 1000 cm s^(-12)`.

An annular disc of radius r_(1 )= 10 cm and r_(2) = 5 cm is placed on a water surface. Find the surface tension force on the disc if we want to pull it from water surface. Take coefficient of surface tension as sigma= 72 dyne//cm, g = 10 ms^(-2) .

A capillary tube of uniform bore is dipped vertically in water which rises by 6 cm in the tube. Find the radius of the capillary tube if the surface tension of water is 72 dyne/cm (g= 980 cm//s^2 ).

Calculate the radius of capillary tube if water rise to a height 4.5 cm . Surface tension of water is 72 dyne /cm .

A long capillary tube of radius r = 1 mm open at both ends is filled with water and placed vertically. What will be the height (in cm ) of the column of water left in the capillary walls is negligible. (surface tension of water is 72 "dyne"//"cm" and g = 1000 "cm"//"sec"^(2) )

A long capillary tube of radius r = 1 mm open at both ends is filled with water and placed vertically. What will be the height (in cm ) of the column of water left in the capillary walls is negligible. (surface tension of water is 72 "dyne"//"cm" and g = 1000 "cm"//"sec"^(2) )

A capillary tube of uniform bore is dipped vertically in water which rises by 7 cm in the tube. Find the radius of the capillary if the surface tension of water is 70dy//cm .

If the surface tension of water is 0.06 Nm^(-1) , then the capillary rise in a tube of diameter 1 mm is (angle of contact = 0^@ ) ………….. .

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^@ .