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Physics
The excess pressure inside one soap bubble is three times that inside a second soap bubble, then the ratio of their surface areas is
Q. The excess pressure inside one soap bubble is three times that inside a second soap bubble, then the ratio of their surface areas is
4602
225
KEAM
KEAM 2008
Mechanical Properties of Fluids
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A
1
:
9
32%
B
1
:
3
8%
C
3
:
1
7%
D
1
:
27
51%
E
9
:
1
51%
Solution:
Accordingly
r
1
4
T
=
3
×
r
2
4
T
⇒
r
2
r
1
=
3
1
Ratio of surface areas
A
2
A
1
=
4
π
r
2
2
4
π
r
1
2
=
9
1