Vacuum Mercury column Height 76 cm (29.92 in.) Air Air pressure pressure Mercury in a container
Vacuum Mercury column Height 76 cm (29.92 in.) Air Air pressure pressure Mercury in a container
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Question
Figure 6.3 illustrates a simple mercury barometer. When a glass
tube is completely evacuated of air and placed into the dish of
mercury, the mercury rises to a height such that the force of the
air pushing on the open dish matches the gravity pulling the
mercury back down the tube. The density of mercury is 13,534
kilograms per cubic meter, which means that mercury is very
dense compared to water (1000 kilograms per cubic meter). In the
mercury barometer, the mercury will rise to 29.92 inches under
standard sea-level pressure. How tall would the barometer need
to be if you used water instead of mercury?
Transcribed Image Text:Vacuum
Mercury
column
Height
76 cm
(29.92 in.)
Air
Air
pressure
pressure
Mercury
in a
container
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