Question

A liquid is filled into a tube with semi elliptical cross section as shown the ratio of the surface tension forces on the curved path of the to the plane apart in vertical position is

Answer 1

Answer:

From the figure,

Curved part = Semi perimeter =  

2

π(a+b)

​

 

and

Plane part = Minor axis =2b

Therefore,

Force on curved part =T×n  

2

π(a+b)

​

 

and

Force on plane part =T×2b

Ratio of surface tension forces on the curved path and the plane part  

=  

4b

π(a+b)

​