Answer to Question #22566 in Mechanics | Relativity for glezel monique polon
P(water) = pgh = 1000[kg/m³]·9.8[m/s²]·30[m] = 294000[N/s²] = 294000 [Pa].
The usual atmospherical pressure is
P(atm) = 10^5[Pa].
Therefore, the absolute pressure at the bottom of a lake is
P(total) = P(water) + P(atm) = 294000[Pa] + 100000[Pa] = 394000[Pa].
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