Which is the average height of a column of mercury (Hg)in a barometer at sea level?
A)760 mm (76 cm).
B)1013 metres.
C)29.00 millibars.
D)This cannot be determined without knowing air temperature.

Question

Quizplus · Accepted Answer

The average height of a column of mercury in a barometer at sea level is 760 mm (or 76 cm) because this is the standard atmospheric pressure at sea level, also known as 1 atmosphere (atm). Option B is not correct because it represents the standard atmospheric pressure in meters, which is not a commonly used unit of measurement for pressure. Option C is also not correct because millibars are a unit of pressure and not of height. Option D is not correct because air temperature does not affect the height of a column of mercury in a barometer at sea level, as long as the barometer is calibrated correctly.

Which Is the Average Height of a Column of Mercury