The height difference between the water surface and the outlet pipe is $7$ m $.$ The inner diameter of the outlet pipe is $30$ mm $.$

a$)$ According to Torricelli's theorem, what is the flow rate $(1000\frac{kg}{m^3})$ in the outlet pipe immediately after the valve opens? You can assume the

flow to be ideal.

b$)$ What is the flow rate if the tank was NOT open and its absolute pressure was $1\mathrm{.}4$ bar?