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Al Tobias (wat4y) - Office: Gibson S123 & Physics 218, (434) 924-0538

Physics Demo Manual

Demonstrations are cataloged according to PIRA Bibliography


Due to Physics Building renovations, the lead time to set up demo requests has increased due to the need to transport equipment across campus. Please be kind and let me know well ahead of time what you need.

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 Surface Tension
 Fluid Statics
 Fluid Dynamics
  video  - Torricelli's Law
 Air Driven Devices
  video  - Venturi Tube
 Toilet paper gun
  video  - Airplane Wing in Wind Tunnel
  video  - Air Flow Dynamics
 Magnus Effect - Cart on Track
  video  - Magnus Effect Appartus
 Terminal Velocity in Glycerin and Water
 Terminal Velocity of Coffee Filters
  video  - Laminar and Turbulent Flow
 Tornado Vortex
 Vortex Cannon

 video  - Torricelli's Law


To show that static pressure is a function of the depth. Or to show that water stream from the opening in the middle of the cylinder has the maximum range.


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  DEMO VIDEO DOWNLOAD w/ sound / 854x480 / 5.69Mb/s / 71MB size  

Fill the cylinder with water through the top hose. Adjust the water flow so the level is held constant at relief opening on the side of the cylinder. Make sure that the openings in the drain pan are above the sink, so that water will drain in it.


The speed of the water exiting from the opening in the side of the cylinder is given by:

v = sqrt{2gh},

Where h is the vertical distance between the water surface and the center of the opening.