What heigh of mercury will exert the same pressure as 5m column of water? (RD of mercury=13.6)
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Answer:
Pressure = dgh
Where d = density
g = acceleration due to gravity
h = height of column
Height of water column= 5m
Density of water = 1 g/cm^3
Let Height of mercury column = h
Density of mercury = RD×density of water= 13.6×1 = 13.6 g/cm^3
They exert same pressure
Or 1×g×5 = 13.6×g×h
Or 5g = 13.6gh
Or h = 5g/13.6g
Or h = 0.368 m
Height of mercury required to exert same pressure is 0.368m
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