Calculate what the atmospheric pressure at the top of a 210m hill is equal to if it is 758mm at its foot.

1) With a rise for every 10.5 meters, atmospheric pressure decreases by 1 mm Hg. Art. This means that when climbing 210 meters, the pressure will drop by 210 / 10.5 = 20 mm Hg. Art.
2) Find the atmospheric pressure at the top of the hill. To do this, subtract the depression from the pressure at the foot.
758 – 20 = 738 mm Hg. Art.
Answer: 738 mm Hg. Art.

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