The mercury column in the barometer at notational atmospheric pressure has a height of?
- 0.76 cm at see level
- 760 cm at sea level
- 7.6 cm at sea level
-
76 cm at sea level
The correct answer is: D
Explanation
The height of the mercury column serves as an indicator of atmospheric pressure. At sea level and at a temperature of 0° Celsius (C), the height of the mercury column is approximately 30 inches, or 76 centimeters. This represents a pressure of approximately 14.7 psia. The 30-inch column is used as a reference standard.
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