The discussion revolves around determining the radius of curvature at the point of contact between two soap bubbles of different radii, r and R. The problem involves concepts related to surface tension and pressure differences in bubbles.
Some participants have provided insights into the relationship between internal and external pressures in bubbles, suggesting a method to approach the problem. However, there remains a lack of explicit consensus on the procedure, and some participants express confusion about the common radius involved in the contact area.
There is mention of a potential discrepancy in the provided book answer and the absence of a procedural explanation. Participants are encouraged to assume a value for surface tension if necessary.
No info about surface tension. even answer is in terms r and R.Dadface said:What do you know about surface tension?
yeah;Dadface said:So do you know the answer?
Dadface said:Surface tension does come into it but in this problem it cancels out.Have you studied surface tension?
Wow!Dadface said:Good,so you should know that the pressure inside a bubble is greater than the pressure outside.Now apply that pressure difference formula to the bubbles when they are in contact.There are three radii of relevance r,R and the common radius over their area of contact.
vkash said:Wow!
great;
i have got the answer.
thanks for helping me.