The excess pressure inside a soap bubble is balanced by 4 mm column of water of specific gravity 1. What will be the surface tension of soap solution if the diameter of soap bubble is 6 mm?

Explanation

To find the surface tension of the soap solution given the excess pressure inside a soap bubble, we can follow these steps:

### Step 1: Understand the relationship between excess pressure and height of water column
The excess pressure (ΔP) inside a soap bubble is given by the formula:
\[ \Delta P = \rho g h \]
where:
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