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A bubble having surface tension T and radius R is formed on a ring radius v as shown. The air molecule collies perpendicularly with the wall of the bubble and stops. Calculate the radius at which the bubble separates from the ring.

A bubble having surface tension T and radius R is formed on a ring radius v as shown. The air molecule collies perpendicularly with the wall of the bubble and stops. Calculate the radius at which the bubble separates from the ring.

Question Image
Grade:11

1 Answers

Kevin Nash
askIITians Faculty 332 Points
6 years ago
Hello Student,
Please find the answer to your question
KEY CONCEPT :
When the force due to excess pressure in the bubble equals the force of air striking at the bubble, the bubble will detach from the ring.
∴ ρAv2 = 4T / R x A ⇒ R = 4T / ρv2
Thanks
Kevin Nash
askIITians Faculty

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