Physics
Fluid-Mechanics
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Question
Two capillary tubes PQ and QR are joined at Q. PQ is 16cm long and has diameter 4 mm. QR is 4cm long and has diameter 2mm. The composite tube is held horizontally with the end P connected to a vessel of water giving a constant head of 10cm and the end R is open to atmosphere. The pressure difference across OR is
- 2 cm of water
- 4 cm of water
- 6 cm of water
- 8 cm of water
The correct answer is: 8 cm of water
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