Determine the minimum gauge pressure needed in the water pipe leading into a building if water is to come out of a faucet on the fourteenth floor, 43

The  gauge pressure is  

Explanation:

From the question we are told that

     The height of the 14th floor from the point where the water entered the building  is  h = 43 m

The  gauge pressure is  mathematically represented as

Where  the m is the mass of the water which is  mathematically represented as  

Where   is the density of the water which has a constant value of   and this standard value of density the volume is   so

Thus  

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .