A drop of olive oil of radius 0.25 mm spreads into a circular film of radius 5 cm on the water surface. Estimate the molecular size of the olive oil

Explanation

To estimate the molecular size of the olive oil drop that spreads into a circular film, we can follow these steps:

### Step 1: Calculate the area of the circular film
The area \( A \) of a circle is given by the formula:
\[ A = \pi r^2 \]
where \( r \) is the radius of the film. Given that the radius of the film is 5 cm, we can substitute this value into the formula:
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