Inches of mercury is something that would only be used in America. Elsewhere in the world, the mercury height would be in millimeters, or about 760mm 76cm.. Mercury has a density of about 13.56 g/cm³, or in other words, each cm of mercury weighs about 13,300 dynes. So 760mm of mercury weighs 1,013,000 dynes. 1 mb is 1 dyne/cm², so what is the air pressure in mb?

Question

Quizplus · Accepted Answer

Since 760mm of mercury equates to 1013,000 dynes, and 1 mb is equivalent to 1 dyne/cm², we can convert dynes to mb by dividing by 1000 (since there are 10 mm in 1 cm). Therefore, 1013,000 dynes is equal to 1013 mb. Thus, the correct answer is B, 1013 mb.

Inches of Mercury Is Something That Would Only Be Used