A barometer can be constructed with a U-shaped tube filled with some liquid, as sown in the figure below. One end of the barometer is closed, with all the air sucked out between the fluid and the cap, and the other end of the barometer is open to atmospheric pressure. If the density of the fluid is 2000 kg/m3, and the difference in height between the ends of the barometer is 5 m, what is the ambient pressure?
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