A meter long narrow bore held horizontally (and closed at one end) contains a 76 cm long mercury thread, which traps a 15 cm column of air. What happens if the tube is held vertically with the open end at the bottom?

A meter long narrow bore held horizontally (and closed at one end) con

1.	A meter long narrow bore held horizontally (and closed at one end) contains a 76 cm long mercury thread, which traps a 15 cm column of air. What happens if the tube is held vertically with the open end at the bottom?
Answer» Solution : Then the HEIGHTS of air column and mercury column are (24 + h) CM and (76 – h) cm respectively.The PRESSURE of air = 76 – (76 – h) = h cm of mercury∴ V2 = (24 + h) cm3 and P2 = h cm.