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2B20.40 - Equilibrium Tubes

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​2B20.40 - Equilibrium Tubes

Title2B20.40 - Equilibrium Tubes

Demonstrates the height of water in various arms of a connected system will be the same regardless of the shape of the container.

Assembly Instructions

Overview:  Make sure that dye in solution is fully dissolved and that no particles are suspended.  The Unit leaks slowly so it should be put into the large blue tray.  Make sure that the dyed solution is very dark for proper visibility.

Instructions:  A large container is filled with colored water and connected at the base through a valve to the special stand.  Begin with all valves closed.  The valve on the opposite side of the stand should flow to a sink for disposal when completed. 


Setup Time10
Operation Time5
Preview Time5
Operation Instructions

When ready to perform the experiment, make sure the valve to the tube to the sink is closed.  Next open the valve on the other side of the stand.  Finally, lift the valve to the large container full of water and watch the water flow into the tubes at equal heights regardless of the container shape.

An exportable version is available.​

Demo on DimeNo
PIRA 200Yes
Export Instructions (if different)
Category2 Fluid Mechanics
Subcategory2B - Statics of Fluids
KeywordsPascal's Vases, pressure, equilibrium, Pascal
Construction Information
equilibrium tubes - plastic and large
equilibrium tube stand - large
bucket with relief hose
tray blue
red dye
water - from the tap
bench clamp
bench rod
monopod wooden rectangular base
Export Setup - small equilibrium tube set of 4, red dyed water, blocking plate