Mechanical Prop...

A capillary tube of radius r is dipped in a liquid of density ρ and surface tension S. If the angle of contact is θ, the pressure difference between the two surfaces in the beaker and capillary

When a large bubble rises from the bottom of a lake to the surface, its radius doubles. If atmospheric pressure is equal to that of column of water height H, then the depth of lake is

A soap bubble in vacuum has a radius of 3 cm and another soap bubble in vacuum has a radius of 4 cm. If the two bubbles coalesce under isothermal condition, then the radius of the new bubble is

The volume of an air bubble becomes three time as it rises from the bottom of a lake to its surface. Assuming atmospheric pressure to be 75 cm of Hg and the density of water to be 1/10 of the density of mercury, the depth of the lake is

Excess pressure of one soap bubble is four times more than the other. Then the ratio of volume of first bubble to another one is

There are two liquid drops of different radii. The excess pressure inside over the outside is

If the radius of a soap bubble is four times that of another, then the ratio of their pressures will be

A spherical drop of water has radius 1 mm. If surface tension of water is 70 × 10^–3 N/m. Difference of pressures between inside and out side of the spherical drop is

Two bubbles A and B (A > B) are joined through a narrow tube. Then

For different capillarities of radii (r), the condition of liquid rise (h) due to surface tension is