Calculate the work done to increase the radius of a soap bubble from 4 cm to 5cm. `sigma = 25 xx 10^(-3) Nm^(-1)`.

Explanation

To calculate the work done to increase the radius of a soap bubble from 4 cm to 5 cm, we will follow these steps:

### Step 1: Understand the Concept
The work done to increase the radius of a soap bubble can be calculated using the change in surface energy. The formula for work done (W) is given by:
\[ W = \Delta E = \sigma \times \Delta A \]
where \( \sigma \) is the surface tension and \( \Delta A \) is the change in surface area.

### Step 2: Calculate the Change in Surface Area
...