Surface Tension Formula

📊 intermediate

$$\gamma = \frac{F}{L}$$

The force per unit length exerted parallel to the surface of a liquid.

Variables & Units

$\gamma$

Surface tension

Unit: $N/m$

$F$

Force of surface tension

Unit: Newton ($N$)

$L$

Length over which force acts

Unit: Meter ($m$)

Key Information

📐 Derived From

Molecular cohesive forces at the liquid-gas interface.

💡 Example

Calculating the force holding a needle on the surface of water.

🔧 Applications

Capillary action and detergent design.

⚠️ Constraints

Applies to the interface between two fluids.

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