AP EAMCET Engineering 21 Apr 2019 Shift 1 Paper

The liquid drop half immersed in the liquid is shown below.
The force acting on the drop due to surface tension is calculated
as
F‌‌=Tl
‌‌=10g(πD)
The observed weight of the drop is calculated as,
w‌‌=wd−wL
‌‌=ρVg−‌

ρ

2

‌

V

2

g
‌‌=‌

3

4

ρVg
Condition for the equilibrium of ball is,
F=w
Substitute values,
10gπD‌‌=‌

3

4

ρg‌

πD3

6

D‌‌=√‌

80

ρ

m