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Byju's Answer
Standard VII
Physics
Wind
Derive the ex...
Question
Derive the expression for excess pressure inside An air bubble
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Solution
Force
due
to
surface
tension
:
F
=
TL
=
T
2
πR
.
.
.
.
.
.
(
1
)
Force
due
to
excess
pressure
on
each
cross
section
of
air
bubble
:
F
=
PA
=
P
πR
2
.
.
.
.
.
.
(
2
)
Expression
for
excess
pressure
in
air
bubble
:
Equate
the
expressions
(
1
)
and
(
2
)
:
P
πR
2
=
T
2
πR
P
=
2
T
R
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