A spherical drop of water has radius 1 mm If the surface tension of water is 70 × 10 − 3 N m - 1 . Difference of pressures between inside and outside of the spherical drop is

Question

A spherical drop of water has radius 1 mm If the surface tension of water is 70 × 10 − 3 N m - 1 . Difference of pressures between inside and outside of the spherical drop is, 35 N m − 2, 70 N m − 2, 140 N m − 2, Zero

MARKS App · Accepted Answer

Δ P = 2 T R = 2 × 70 × 10 − 3 1 × 10 − 3 = 140 N ​ m - 2

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