Untitled Document

Question Bank No: 2

1. The radius of a soap bubble is r and the surface tension of soap solution is T. Keeping the temperature constant, the bubble is blown to twice diameter. The necessary energy will be

a)		24 $π r^{2} T$
b)		8 $π r^{2} T$
c)		12 $π rT$
d)		16 $π r^{2} T$

2. The pressure of a gas is proportional to

a)		The sum of kinetic and potential energies
b)		Potential energy
c)		Kinetic energy
d)		None