what is meant by the statement atmospheric pressure at a place is 76 CM of HG
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Explanation:
It means atmospheric pressure at that place is equal to pressure exerted by base of tube filled with 76 cm of mercury column.
Density (d) of mercury is 13600 kg/m³
Pressure = hdg
= 0.76 m × 13600 kg/m³ × 9.8 m/s²
≈ 101325 Pa
= 1 atm.
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