Question

The spherical liquid bubble of diameter ` 4 xx 10^(-3)` m has inner and outer pressure as 1.005 and tension of the lquid of the liquid is
A. 250 N/m
B. 25N/m
C. `2.5`N/m
D. `0.25` N/m

Answer 1

Correct Answer - D
` P = P_(0) + (4T )/r " " :. (4T)/r= P- P_(0)`
` T = (0.005 xx 105 xx 2 xx 10^(-3))/4 = 0.25 `N/m ,