Question

6. Two capillary tubes of equal length and inner radii
mercury, find the pressure difference between the
gms)
two ends of the first capillary tube.
2 r and 4 r respectively are added in series and a
liquid flows through it. If the pressure difference
between the ends of the whole system is 8.5 cm of mercury,find the pressure difference between the ends
of the first capillary tube​

Answer 1

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Answer 2

Answer:

Two capillary tubes of equal length and inner radii 2r and 4r respectively are added in series and a liquid flows through it. If the pressure difference between the ends of the whole system is 8.5 cm of mercury, find the pressure difference between the ends of the first capillary tube.

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Text Solution

Solution :

Let

be the pressure at the beginning of a tube, at the joint of two tubes and at the end of second tube. Since the two tubes are in series, so <br>

<br> or

<br> or

...(i) <br> Given,

...(ii) <br> Fron (i) and (ii) , we have <br>

<br> or

. <br>

pressure difference between the ends of the first tube <br>

<br>