Due to surface tension, the excess pressure inside a smaller drop is 9 units. If 27 smaller drops of same liquid combine then the excess pressure inside the bigger drop is

Step-by-step solution

Excess pressure Or Pressure jump =2 ( r )=9 units If 27 such drops combine, total volume is: V _ B =27 ~V _ S Using volume conservation: aligned & 4 3 R ^3=27 ( 4 3 R ^3 ) & R =(3 r ) & Excess pressure = 2 R = 2 3 r =3 units aligned