Fluid Mechanics Physics - Fluid Mechanics

$\text{P}=\lim_\limits{\triangle\text{s}\rightarrow0}\frac{\text{F}}{\triangle\text{s}}$ and $\text{P}_1-\text{P}_2-\text{pgz}$

1. Both the equations are valid.
2. The first is valid but not the second.
3. The second is valid but not the first.
4. Both are invalid.

1. The water level in the tank will keep on rising.
2. No water can be stored in the tank.
3. The water level will rise to a height $\frac{\text{v}^2}{2\text{g}}$ and then stop.
4. The water level will oscillate.