Hydrostatics, Length of a mercury column

  • #1

Homework Statement


What will be the length of mercury column in a barometer tube, when the atmospheric pressure is 75 cm of mercury and the tube is inclined at an angle of 60° with the horizontal direction?

Homework Equations


Pascal's Law

The Attempt at a Solution


l ⋅ sinϑ = h
l = h / sinϑ
l = h / sin 60
l = 75 / 0.86
l = 87.2
but the correct answer given in the textbook is 86.6
 

Answers and Replies

  • #2
gneill
Mentor
20,804
2,784
Use more significant figures for intermediate calculations. Only round results at the end.
 
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