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11 results for "Surface Tension"
11 results for "Surface Tension"
Laplace's Law and Aneurysms
What it shows:
Blow up a long cylindrical balloon and it inflates according to Laplace's law. Arteries, which also need to be flexible, are designed to fight against the kind of aneurysms seen in inflating rubber balloons.
How it works:
Laplace's law for...
The Surface Treatment of Glass
What it shows:
The strength of a material in tension or compression will be affected by discontinuities in its surface structure. This can be demonstrated for glass using microscope slides, and the comparison of failure stress before and after the removal...
Double Bubble
What it shows
When two different size soap bubbles are connected together, the smaller diameter bubble will shrink and collapse to blow up the larger diameter bubble. One can use this to demonstrate Laplace's law or the phenomenon of minimizing the...
Capillary Action
What it shows:
How it works:
The setup shows the direct comparison between four capillary tubes of different bores. The...
Fluid Mechanics
Friction Blocks
Selection of blocks that slide down a variable-angle inclined plane to demonstrate the various aspects of friction.
What it shows:
There are actually three (or more) demonstrations under the wing of this title: (1) A block or box is placed on an adjustable...
Resonant Fountain Tube
Standing sound waves in a glass pipe are made evident by the fountains of kerosene inside the pipe.
What it shows:
The air inside a very large glass pipe (partially filled with a fluid) is acoustically excited into a standing wave. Once resonating, the...
Vortex Shedding in Air
A thin wire, moving through the air, is made to vibrate in the audio range at the vortex shedding frequency.
What it Shows
When air flows around an object, there is a range of flow velocities for which a von Karman vortex street is formed. The shedding...
Molecular Size
Also known as the Ben Franklin pond experiment, after a story in B.F's autobiography.
Olive oil with a known volume is dropped onto water. The water has been dusted with lycopodium powder, which floats on the surface. The oil drop expands, pushing the...