Calculate the water pressure at the bottom of the aquarium and on the fish, if the water level in the aquarium is 40 cm

Calculate the water pressure at the bottom of the aquarium and on the fish, if the water level in the aquarium is 40 cm, the length of the aquarium is 50 cm, width is 25 cm, and the fish swims at 20 cm.

Data: h (water level in the aquarium used) = 40 cm = 0.4 m; L (aquarium length) = 50cm; B (aquarium width) = 25cm; h1 (the level at which the fish swims).

Constants: ρw (density of water in the aquarium) = 1000 kg / m3; g (acceleration due to gravity) ≈ 10 m / s2.

1) Pressure at the bottom: P1 = ρw * g * h = 1000 * 10 * 0.4 = 4 * 10 ^ 3 Pa (4 kPa).

2) Pressure on the fish: P2 = ρw * g * h1 = 1000 * 10 * 0.2 = 2 * 10 ^ 3 Pa (2 kPa).

Answer: The pressure on the bottom of the aquarium used is 4 kPa, on the fish – 2 kPa.