Question

a 10cm air column is trapped inside the tube(having uniform area of cross section) by 6cm of hg and is placed horizontally to the plane. calculate the length of air column when the tube is placed vertically with opened end up​

Answer 1

Answer:

Explanation:

upward pressure on Hg column=760mm=P1,downward pressure=80mm+10cm of air=P2, which is obviously less than P1.

So the mercury column will be pushed up by the air below it and compresses the trapped air column till its pressure increases to the point where equilibrium is established.

Answer 2

Upward pressure on mercury column =760mm =P1,

Downward pressure on mercury column =80mm+10cm of air =P2,

which is obviously less than P1.

Hence, the mercury column will be pulleed upward by the air below on it and it will compresse the air column till its pressure increases to the point where equilibrium is fixed.