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?
A)760 mb
B)1,000,000 mb
C)1013 mb
D)1)013 mb

Question

Quizplus · Accepted Answer

Since 1 mb is equal to 1 dyne/cm2 and 760mm of mercury weighs 1,013,000 dynes, the air pressure in mb would be 1,013 mb (not to be confused with 1,000,000 which is much larger). This is also known as the standard atmospheric pressure at sea level. Therefore, the best choice is C.

Inches of Mercury Is Something That Would Only Be Used