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Capillary Tubes


A series of glass tubes with different internal diameters, all connected by a bigger glass tube at the bottom. Comes with a plastic stand.


To show capillary action in narrow tubes and to show that the rise is greatest for the smallest diameter tube for water.


  • Capillary apparatus
  • Dyed water


Fill apparatus as shown with coloured water, and set up a close-up camera (if necessary) to closely compare the height of each column of water. Pascals principle dictates that the water should be level in each tube, but the capillary effect causes a visible deviation from this.


Demo room information

Location C4
Maker Unknown
Current State Working
demonstrations/2_fluid_mechanics/2a_surface_tension/capillary_tubes/start.txt · Last modified: 2020/03/13 20:30 by demoroom