An iceberg broke away from a powerful ice field in Antarctica. Determine the atmospheric pressure at the top of the iceberg if the pressure was 540 mm Hg over an ice field 1800 m thick. Art.
1) The density of ice and water is not the same and correlates as 900: 1000, that is, after falling into the water, 9/10 of the iceberg will be under water, and 1/10 – above the water. Let’s determine the height of the iceberg above the water:
1800 m × 0.1 = 180 m
2) Find the height difference between the surface of the ice field and the iceberg: 1800 m – 180 m = 1620 m
3) Find the pressure on the iceberg surface:
540 mmHg Art. + 1620 m × 1 mm Hg. Art. : 10 m = 702 mm Hg. Art.
Answer: the atmospheric pressure at the tip of the iceberg is 702 mm Hg. Art.
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