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 (A) 35Nm- 2 (B) 70Nm- 2 (C) 140Nm- 2 (D) Zero

Tardigrade Admin · Accepted Answer

Δ P=(2 T/R)=(2 × 70 × 10- 3/1 × 10- 3)=140N textâ m- 2

Q. A spherical drop of water has radius $1 mm$ If the surface tension of water is $70 \times 1 0^{- 3} N m^{- 1}$ . 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

$Δ P = \frac{2 T}{R} = \frac{2 \times 70 \times 1 0 ^{- 3}}{1 \times 1 0 ^{- 3}} = 140 N m^{- 2}$

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

35Nm−2

70Nm−2

140Nm−2