The excess pressure inside a soap bubble is?


Question: The excess pressure inside a soap bubble is?

The excess pressure inside a soap bubble is given by the formula:

$$ P = \frac{4\gamma}{r} $$


where:

- \( P \) is the excess pressure,

- \( \gamma \) is the surface tension of the soap solution,

- \( r \) is the radius of the bubble.


This formula accounts for the fact that a soap bubble has two surfaces (inner and outer), each contributing to the surface tension.

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