Surface-tension & vapour pressure of `H_2O` at `20^@` is `7.28 xx 10^-2 N//m & 2.33 xx 10^3 Pa`. Find out the radius of smallest spherical water droplet . Which don't get vapourise at `20^@`C.

If the surface tension of water is 7.3xx10^-2 N. m^-1 , then what is the pressure inside a spherical drop of water of radius 10^-3 m?

The surface tension T = 7.28 xx 10^-2 N//m and the contact angle is 0^@ for any liquid. The radius of the capillary tube is r = 2.5 xx 10^-5m . Is surface tension sufficient to rise the water?

Water and chlorobenzene are immiscible liquids. Their mixture boils at 90^@C under a reduced pressure of 7.82 xx 10^4 Pa. The vapour pressure of pure water at 90^@C is 7.03 xx 10^4 Pa. On weight percent basis, chiorobenzene in the distillate is equal to (mol. wi. of chlorobenzene is 112.5 g mol^-1 )

What is the pressure inside a drop of mercury of radius 3.00 mm at room temperature? Surface tension of mercury at that temperature (20^@ C) is 4.65xx10^-1 N. m^-1 . The atmospheric pressure is 1.01xx10^5 Pa. Also give the excess pressure inside the drop.

A person measure the presssures of his car tyre to be 2 times 10^5 Pa At that time the temperature and pressure of the atmosphere are 27^@C and 1 times 10^5 Pa respectively. Then he travels to another city where the temperature and pressure of the atmosphere are 12^@C and 6.7 times 10^4 Pa respectively. Them what will be the pressure of his car tyre at that time. Assume the volume of the tyre is same in both cases.

A square of side 20 cm is enclosed within a sphere of radius 80 cm . Centres of the sphere and the square coincide at a common point . There are four charges of 2xx10 ^(-6 ) C. -5xx 10 ^(-6 ) , C .-3xx 10 ^(-6 ) C and 6xx10 ^(-6) C at the four corners of the square . the electric flux passing through the surface of the sphere in N .m ^(2) //C.