Pure water enters through pipe $1$ with a velocity of $0\mathrm{.}003\frac{m^3}{s}.$ The radius of the pipe is $6cm.$ another stream of water enters from $2$ with a molar flowrate of $72$ mole$/$s$.$ If water exits from pipe $4$ with $9k\frac{g}{s}.$ calculate the following:

Velocity at pipe $4$

Diameter of pipe $4$

Mass flow rate at pipe $3$

Direction of flow at pipe $3$

Question $2$

A liquid with a specific density of $0\mathrm{.}7$ enter in the pipe below with a velocity of $98\mathrm{.}5f\frac{t}{s}$ at point $1$ and volume flowrate of $0\mathrm{.}05\frac{L}{s}$ at point $2,$ calculate the volume, mass and molar flowrate if the molecular weight of the liquid is $80$ for all points?

Given:

Diameter of pipe $1$ is $25cm$

Diameter of pipe $2$ is $15cm$

Diameter of pipe $3$ is $35cm$