6 The atmospheric pressure at a place is 75 cm of Hg. What
does it mean? express it in Nm?.
12
(density of Hg = 13.6 g cm & g = 9.8 ms?)
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Answer:
The Atmospheric Pressure of a place is 75 cm of Hg means that the place has such an atmospheric level that the height of barometric column can be balanced only upto 75 cm.
Pressure (P) = hpg
∴ h = 75 cm = 0.75 m
∴ p = 13.6 g/cc = 13600 kg/m³
= (0.75*13600*9.8) N/m²
= 99960 N/m²
I hope this helps.
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