A glass capillary contains enclosed air by a thread of mercury 15cm long when the tube is horizontal, the length of the enclosed air column...

      

A glass capillary contains enclosed air by a thread of mercury 15cm long when the tube is horizontal, the length of the enclosed air column 24cm as shown.
fig7831520191237.png
i) What is the length of the enclosed air column when the tube is vertical with the open end uppermost if the atmosphere pressure is 750mmHg?
ii) Explain why the mercury does not run out when the tube is vertical with the closed end uppermost.

  

Answers


Kavungya
fig7931520191239.png
iii) The mercury does not run out because the upwards atmospheric pressure in the mercury column is greater than the downward pressure due to the enclosed air and its own mass.
Kavungya answered the question on May 31, 2019 at 09:40


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