# Surface Tension Of Raindrops

Small raindrops are actually perfectly spherical. The pressure difference between the inside and outside of a spherical raindrop of volume $$4.2 \times 10^{-9}~\mbox{m}^3$$ is $$280~\mbox{Pa}$$. What is the surface tension in N/m of the water on the outside of the raindrop?

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