Grayed Demos are either not available or haven't been built yet

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

surface tension/Adhesion balance

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

pull on the ring

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.

PIRA #

Demonstration Name

Abstract

PIRA #

Demonstration Name

Abstract