The mercury column in the barometer at notational atmospheric pressure has a height of?
A.
0.76 cm at see level
B.
760 cm at sea level
C.
7.6 cm at sea level
D.
76 cm at sea level
Correct answer is D
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.
