obtain expression for rise and fall in a capillary tube using pressure difference
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Answer:
P
B
−P
C
=
R
2T
---------(1) &
P
B
=P
O
--------(3)
P
A
=P
o
--------(4)
P
C
+ρgh=P
A
------(2)
From (1),(2)&(3),(4) press are gradient
P
o
−
R
2T
=Pρgh
R
2T
=ρgh⇒h=
Rρg
2T
=
ρgr
2Tcosθ
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