Question

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Find the pressure inside a water droplet having diameter of 0.5 mm at 20 degree Celcius if the outside pressure is 1.03N/cm 2and the surface tension of water at that temperature is 0.0736 N/m.

Answer 1

Hey mate!

Here's your answer!!

t = 0.736 N/m

Pressure inside the droplet,

$r = \frac{d}{2} = \frac{0.5}{2} = 0.025mm$


$p = \frac{2t}{r}$

$p = \frac{2 \times 0.0736}{0.025} = 1.62n |cm {}^{3}$


= 1.62 N/cm³


Hope it helps you!!
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