the internal diameter of the tube of a mercury barometer is 3 mm find the corrected reading if the - Physics -

Question

the internal diameter of the tube of a mercury barometer is 3 mm
find the corrected reading if the observed reading is 76 56 cm S T
of mercury =0 48 N/m angle of contact of mercury in glass =140 ,
density of mercury =13600 kg/m3 , g=9 8m/s2

Vaibhav T. · Accepted Answer

Dear Student,

h=2σcosθrρgh=2×0 48×cos140°1
5×10-3×13600×9 8h=2×0 48×-0 1971
5×10-3×13600×9 8h=9 4×10-4 m

The negative sign indicate that the reading of the barometer is
less than the correct value by 0 094 cm

Correct value = 76 56 + 0 094 = 76 654 cm

the internal diameter of the tube of a mercury barometer is 3 mm. find the corrected reading if the observed reading is 76.56 cm .S.T of mercury =0.48 N/m. angle of contact of mercury in glass =140 , density of mercury =13600 kg/m3 , g=9.8m/s2.

the internal diameter of the tube of a mercury barometer is 3 mm. find the corrected reading if the observed reading is 76.56 cm .S.T of mercury =0.48 N/m. angle of contact of mercury in glass =140 , density of mercury =13600 kg/m³ , g=9.8m/s².