Ex. 29 A barrometer tube has a diameter of 4 mm. Calculate the error in the reading if the S.T. of mercury is 0.64 N/m and its angle of contact with glass is 140°. Density of mercury = 1.36 x 104 kg/m %3D
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![Ex. 29 : A barrometer tube has a diameter of
4 mm. Calculate the error in the reading if the
S.T. of mercury is 0.64 N/m and its angle of
contact with glass is 140°.
Density of mercury = 1.36 x 104 kg/m
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