Pressure in water increases with depth due to the weight of the water above. The relationship between pressure and depth in a fluid is given by the hydrostatic pressure formula:

P=P0+ρgh

where:

·         P is the pressure at depth,

·         P0 is the atmospheric pressure at the surface (approximately 101,325101,325101,325 Pa or 111 ATM at sea level),

·         P is the density of the fluid (for water, approximately 100010001000 kg/m³),

·         g is the acceleration due to gravity (approximately 9.819.819.81 m/s²),

·         h is the depth below the surface of the fluid.

For example, at a depth of 10 meters in water, the pressure can be calculated as:

P=101,325 Pa+(1000 kg/m3×9.81 m/s2×10 m)

P=101,325 Pa+98,100 Pa

P=199,425 Pa

So, the pressure at 10 meters depth in water is approximately 199,425 Pa, or about 2 atm.

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