List of top Physics Questions on mechanical properties of fluid asked in AMUEEE

Work done in increasing the size of a soap bubble from a radius of $ 3 \,cm $ to $ 5 \,cm $ is nearly (surface tension of soap solution $ = 0.03\, Nm^{-1} $ ).

A solid sphere falls with a terminal velocity of $20\, m/s$ in air. If it is allowed to fall in vacuum?

Consider a soap film on a rectangular frame of wire of area $4 \times 4\, cm ^{2}$. If the area of the soap film is increased to $4 \times 5 \,cm ^{2}$, the work done in the process will be (The surface tension of the soap film is $3 \times 10^{-2} \,N / m .$ )

A drop of water of radius $0.0015 \,mm$ is falling in air. If the coefficient of viscosity of air is $2.0 \times 10^{-5} \,kg / ms$, the terminal velocity of the drop will be (The density of water $=1.0 \times 10\, kg / m ^{3}$ and $g=10\, m / s ^{2}$ )