Answer:
In case of 5 m/s:
> i.e >0, It means Water will leak out of hole.
In case of 0.5 m/s:
< i.e <0. It means air will enter into the pipe.
Explanation:
Note:
Values of constant v,f and can vary according to the conditions. Value taken below are taken from water properties table.
According to Bernoulli Equation: Considering the frictional affects
Where:
is the pressure at other end of pipe(outlet)=0
is the pressure at hole
Above equation will become:
Calculating Re number:
Where:
V is the velocity
D is the diameter
v is the kinematic viscosity of water. Lets consider it . However kinematic viscosity can be taken according to temperature.
In case of 5 m/s:
Re=
For galvanized iron pipe , Roughness coefficient ε is 0.15 mm
From Moody Charts, At above Re and , Value of friction coefficient f is≈0.045.
≈9800 N/m^2
> i.e >0, It means Water will leak out of hole.
In case of 0.5 m/s:
Same above Procedure:
Calculating Re:
Re=
From Moody Charts, At above Re and , Value of friction coefficient f is≈0.052.
< i.e <0. It means air will enter into the pipe.