Questions in Mechanical Properties of Fluids

Select	Question
	The surface tension of a liquid is 5 N/m. If a thin film of the area $0.02 m^2$ is formed on a loop, then its surface energy will be
	If work W is done in blowing a bubble of radius R from a soap solution, then the work done in blowing a bubble of radius 2R from the same solution is
	A spherical drop of oil of radius 1 cm is broken into 1000 droplets of equal radii. If the surface tension of oil is 50 dynes/cm, the work done is
	The work done in blowing a soap bubble of radius r of the solution of surface tension T will be
	If two identical mercury drops are combined to form a single drop, then its temperature will
	If the surface tension of a liquid is $T$, the gain in surface energy for an increase in liquid surface by $A$ is
	The surface tension of a soap solution is$2\times {{10}^{-2}}N/m.$ To blow a bubble of radius 1 cm, the work done is
	A mercury drop of 1 cm radius is broken into ${{10}^{6}}$ small drops. The energy used will be (surface tension of mercury is $35\times {{10}^{-3}}N/cm)$
	The surface tension of a liquid at its boiling point
	Surface tension of a soap solution is $1.9\times {{10}^{-2}}N/m.$. Work done in blowing a bubble of 2.0 cm diameter will be