What is the metric equivalent of barometric pressure expressed in millimeters of mercury for atmospheric pressure (29.92 "Hg)?

What is the metric equivalent of barometric pressure expressed in millimeters of mercury for atmospheric pressure (29.92 "Hg)?

• A. 750 mm Hg
• B. 760 mm Hg
• C. 770 mm Hg
• D. 780 mm Hg

Answer: (B)

Barometric pressure is commonly expressed in inches of mercury (inHg) or millimeters of mercury (mm Hg). Standard atmospheric pressure at sea level is defined as 29.92 inches of mercury, and the conversion between these two units is grounded in the relationship that 1 inch of mercury is equivalent to approximately 25.4 millimeters of mercury. To find the metric equivalent of 29.92 inches of mercury, we multiply by the conversion factor: 29.92 inches × 25.4 mm/inch = 760 mm Hg. This value, 760 mm Hg, represents standard atmospheric pressure and is widely recognized in various scientific and engineering contexts. Thus, converting 29.92 inches of mercury accurately reveals that the correct metric equivalent is 760 mm Hg, which aligns with the choice provided. This standard is crucial for applications in meteorology, engineering, and physics where pressure measurements are essential.

Barometric pressure is commonly expressed in inches of mercury (inHg) or millimeters of mercury (mm Hg). Standard atmospheric pressure at sea level is defined as 29.92 inches of mercury, and the conversion between these two units is grounded in the relationship that 1 inch of mercury is equivalent to approximately 25.4 millimeters of mercury.

To find the metric equivalent of 29.92 inches of mercury, we multiply by the conversion factor:

29.92 inches × 25.4 mm/inch = 760 mm Hg.

This value, 760 mm Hg, represents standard atmospheric pressure and is widely recognized in various scientific and engineering contexts.

Thus, converting 29.92 inches of mercury accurately reveals that the correct metric equivalent is 760 mm Hg, which aligns with the choice provided. This standard is crucial for applications in meteorology, engineering, and physics where pressure measurements are essential.