A fluid enters a hollow conical pipe at $S_{1}$ with velocity $\mathrm{V}_{1}$ and goes out $\mathrm

Question

A fluid enters a hollow conical pipe at $S_{1}$ with velocity $\mathrm{V}_{1}$ and goes out $\mathrm{S}_{2}$ with velocity $\frac{\mathrm{V}_{1}}{5}$. This is likely to be\

Professor PC Thomas Classes · Answer

For a liquid $a_{1} v_{1}=a_{2} v_{2}$ Calculate $a_{1} v_{1}$ and $a_{2} v_{2}$\ $a_{1} v_{1}=\pi R^{2} v_{1} \quad a_{2} v_{2}=\pi(2 R)^{2} \frac{v_{1}}{5}$\ Thus $a_{1} v_{1} 
eq a_{2} v_{2}$\ Therefore the fluid cannot be a liquid. Then what can it be?\