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Size: 1648
Comment:
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Size: 2219
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
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| ||2A10.25|| leaky boats|| Try to float several large (one foot long) flat bottomed boats made of different screen material or aluminum with different size holes. A screen boat, razor blade, or small metal boat with a large hole all float on water.|| | ||2A10.25||<#dddddd> leaky boats||<#dddddd> Try to float several large (one foot long) flat bottomed boats made of different screen material or aluminum with different size holes. A screen boat, razor blade, or small metal boat with a large hole all float on water.|| ||2A10.30||<#dddddd> surface tension/Adhesion balance||<#dddddd> An improved method for measuring surface tension by the direct pull method. A glass plate on one end of a balance beam is in contact with a water surface.|| ||2A10.32||<#dddddd> pull on the ring||<#dddddd> Pull a large ring away from the surface of a liquid with a spring sale.|| ||2A10.33||<#dddddd> surface tension disc||<#dddddd> A flat glass disc on a soft spring is lowered onto the surface of distilled water and the extension upon pulling the disc off the water is noted.|| |
Surface Tension
PIRA classification 2A
Grayed Demos are either not available or haven't been built yet |
2A10. Force of Surface Tension
PIRA # |
Demonstration Name |
Abstract |
2A10.10 |
soap film pullup |
A soap film pulls a sliding wire up a "U" shaped frame. |
2A10.11 |
sliding wire |
A sliding wire frame film with a spring on one end and a string pull on the other shows that tension does not increase with length. |
2A10.15 |
submerged float |
A cork and lead device floats with a wire ring above the surface. Push the ring below the surface and it remains until soap is added to reduce the surface tension. |
2A10.20 |
floating metals |
Float needles, paperclips, rings of wire, etc. on water. |
2A10.21 |
floating metal sheet |
Float a sheet of metal on the surface of distilled water and add weights until the metal sinks. |
2A10.25 |
leaky boats |
Try to float several large (one foot long) flat bottomed boats made of different screen material or aluminum with different size holes. A screen boat, razor blade, or small metal boat with a large hole all float on water. |
||2A10.30||<#dddddd> surface tension/Adhesion balance||<#dddddd> An improved method for measuring surface tension by the direct pull method. A glass plate on one end of a balance beam is in contact with a water surface.|| ||2A10.32||<#dddddd> pull on the ring||<#dddddd> Pull a large ring away from the surface of a liquid with a spring sale.||
2A10.33 |
surface tension disc |
A flat glass disc on a soft spring is lowered onto the surface of distilled water and the extension upon pulling the disc off the water is noted. |
2A15. Minimal Surface
PIRA # |
Demonstration Name |
Abstract |
2A20. Capillary Action
PIRA # |
Demonstration Name |
Abstract |
2A30. Surface Tension Propulsion
PIRA #
Demonstration Name
Abstract
[:Demonstrations:Demonstrations]
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