If a drop of liquid breaks into smaller droplets, it results in lowering of temperature of the dorplets. Let a drop f radius R,break into N small droplets each of radius r. Estimate the dorp in temperature.

A big drop of radius R is formed by 1000 small droplets of water, then radius of small drop is

An oxygen cylinder of volume 30 litres has an initial gauge pressure of 15 atm and a temperature of 27 ^@C . After some oxygen is withdrawn from the cylinder, the gauge pressure drops to 11 atm and its temperature drops to 17 ^@C . Estimate the mass of oxygen taken out of the cylinder ( R= 8.31 J mol^-1 K^-1 ’, molecular mass of O_2 = 32 u)

27 small drops, each having charge q and radius r coalesce to forma big drop. How many times charge and capacitance will become?

The time of oscillation of t of a small drop of a liquid under surface tension depends upon the density d, the radius r and the surface tensions s. Prove dimensionally that t infty sqrt(dr^3//s)

Twenty seven spherical droplets of radius 3 mm and each carrying 10^-12 of charge are combined to form a bigger drop. Find the capacitance of the bigger drop.

If inside a big circle exactly n(nlt=3) small circles, each of radius r , can be drawn in such a way that each small circle touches the big circle and also touches both its adjacent small circles, then the radius of big circle is (a) r(1+cos e cpi/n) (b) ((1+tanpi/n)/(cospi/pi)) (c) r[1+cos e c(2pi)/n] (d) (r[s inpi/(2n)+cos(2pi)/n]^2)/(sinpi/n)

What is the pressure inside the 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 1.01xx 10^5Pa . Also give the excess pressure inside the drop.