One metre long tube, closed at both ends, is lying horizontally. A mercurry column of length 0.1 m is filled in its middle and in rest two parts air is filled at atmospheric pressure. What will be the displancement of the mercurry column when the tube is turned to vertical position ? Atmospheric pressure = 0.76 m of Hg.

Explanation

To solve the problem step by step, we will analyze the situation and apply the principles of physics, particularly the behavior of gases and the concept of pressure.

### Step 1: Understand the Initial Conditions
The tube is 1 meter long and is closed at both ends. In the middle, there is a mercury column of length 0.1 m, and the remaining two parts are filled with air at atmospheric pressure (0.76 m of Hg).

### Step 2: Determine the Lengths of Air Columns
When the tube is horizontal, the lengths of the air columns on either side of the mercury column can be calculated as follows:
- Total length of the tube = 1 m
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