The potential energy possessed by a soap bubble, having surface tension equal to 0.04 Nm^-1 of diameter 1 cm, is

Radius of one arm of hydraulic lift is four times of radius of other arm.  What force should be applied on narrow arm to lift 100 kg ?

A U-tube of uniform cross-section is partially filled with a liquid I.  Another liquid II which does not mix with liquid I is poured into one side.  It is found that the liquid levels of the two sides of the tube are the same, while the level of liquid I has risen by 2 cm.  If the specific gravity of liquid I is 1.1, the specific gravity of liquid II must be

Drops of liquid of density are floating half immersed in a liquid of density .  If the surface tension of the liquid is T, then the radius of drop will be :

A hemispherical portion of radius R is removed from the bottom of a cylinder of radius R.  The volume of the remaining cylinder is V and mass M.  It is suspended by a string in a liquid of density , where it stays vertical.  The upper surface of the cylinder is at a depth h below the liquid surface.  The force on the bottom of the cylinder by the liquid is

The ratio of the terminal velocities of two drops of radii R and R/2 is

Liquid rises to a height of 2 cm in a capillary tube.  The angle of contact between solid and liquid is zero.  The tube is depressed more now so that the tip of the capillary tube is only 1 cm above the liquid, the apparent angle of contact between solid and liquid is

A liquid X of density 3.36 g/cm³ is poured in the right arm of a U-tube, which contains Hg.  Another liquid Y is poured in left arm with height 8 cm, upper levels of X and Y are same.  What is density of Y ?

A 15 cm x 6 cm x 0.1 cm slide suspended with its longest side vertical.  10% part of this slide is dipped into the water.  In this state its apparent weight is equal to its real weight.  The surface tension of water will be :