NTA Abhyas JEE Main2020PhysicsMechanical Properties of FluidsPractice
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
Options
- A35   N   m − 2
- B70   N   m − 2
- C140   N   m − 2
- DZero
Correct answer
C. 140   N   m − 2
Step-by-step solution
Δ P = 2 T R = 2 × 70 × 10 − 3 1 × 10 − 3 = 140   N ​  m - 2