volume_mute
The height of a mercury column
publish date: 2026/05/19 19:27:55.797709 UTC
volume_mute
At sea level, a mercury barometer typically shows a column height of approximately 30 inches. What is this same height expressed in centimeters?
Correct Answer
76 cm
Explanation
The mercury column rises to a height of about 30 inches, which is equivalent to approximately 76 centimeters (since 1 inch = 2.54 cm, 30 × 2.54 = 76.2 cm). This is a standard reference value for atmospheric pressure at sea level.
Reference
Basic Physics: A Self-Teaching Guide