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Question: Answered & Verified by Expert
In a cylinder provided with a piston, air is under pressure $P_1$ at a constant temperature ' $t$ '. A soap bubble with radius ' $r$ ' and surface tension ' $\mathrm{T}$ ' is lying inside the cylinder. To reduce the radius of the soap bubble to half, the required air pressure inside the cylinder is
PhysicsMechanical Properties of FluidsAP EAMCETAP EAMCET 2017 (25 Apr Shift 2)
Options:
  • A $8 \mathrm{P}_1+\frac{24 \mathrm{~T}}{\mathrm{r}}$
  • B $8 \mathrm{P}_1+\frac{3 \mathrm{~T}}{\mathrm{r}}$
  • C $8 \mathrm{P}_1+\frac{2 \mathrm{~T}}{\mathrm{r}}$
  • D $8 \mathrm{P}_1+\frac{12 \mathrm{~T}}{\mathrm{r}}$
Solution:
1136 Upvotes Verified Answer
The correct answer is: $8 \mathrm{P}_1+\frac{24 \mathrm{~T}}{\mathrm{r}}$
No solution. Refer to answer key.

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