Consider a fish swimming 5 m below the free surface of water. The increase in the pressure exerted on the fish when it dives to a depth of 25 m below the free surface is (a) 196 Pa (b) 5400 Pa (c) 30,000 Pa (d) 196,000 Pa (e) 294,000 Pa

Find the pressure at the bottom of a tank containing a 3 m thick layer of mercury, a 2 m thick layer of water, and a 4 m thick layer of oil (D = 700 kg/m3). The tank is open to the air.

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The bottom corner of a water tank that is 3 m wide (into the page) is constructed with a flat panel at an angle of 45° as shown in the figure below. The panel in question is shown as a heavy line. Note that water has a density of 1000 kg/m3. Determine:  2a) The magnitude of the total resultant force acting on the panel, FR 2b) The depth of below the water surface at which the resultant force vector acts on the panel, d