Answer:
P = 52 kPa
Explanation:
Hidrostatic pressure is defined as the product of the height of liquid (h) by its specific weight (ρ) and by the acceleration of gravity (g).
In the first scenario, the atmospheric pressure is:
[tex]10,000 = \rho g h_{1}\\10,000 = \rho g*1\\\rho g = 10,000[/tex]
In the second scenario, h = 4.2 + 1 m. Therefore, the pressure at the bottom of the barrel is:
[tex]P= \rho g h_{2}\\P= 10,000*5.2\\P=52,000\\P=52kPa[/tex]
The pressure on the bottom when water is added to fill the pipe to its top is 52 kPa.
