Water: To stick or not to stick

An exploration of the properties of adhesion, cohesion, and surface tension in water. Polarity of a water molecule is discussed. The law of electric charges is explained and related to the main topic. This video was made as a final project for a 4 credit graduate course through the American Museum of Natural History in conjunction with Plymouth State University. It may be used for Educational Purposes only. ©2006 any other use must be granted permission by author.

Category:

Howto & Style

Tags:

• water
• cohesion
• adhesion
• surface
• tension
• polarity
• molecule
• electric
• charges
• law
• mercury
• alcohol
• attraction
• repulsion
• drop

[atemme]

I charged the balloon by rubbing it with a piece of fur. You can use a person's head of hair if you wish as well. I do not have hair so I usually resort to the fur.

[captaindisguise]

Hey, i have a question, at 6:52

Why did all the pepper move away to the sides of the container ?

Thank You

[atemme]

@captaindisguise It is my understanding that as the soap spreads out on the surface of the water it pushes the pepper to the sides. Then the surface tension of the water is weaker so the pepper then breaks through and sinks.

[7517638]

Great substance; however even the best substance is lost or goes undelivered in the absence of supporting style. This Vid needs a re-shoot with narrator volume turned UP.

[atemme]

Thanks. I know about the volume but have not found the time to fix it. :(

[atemme]

Hey by the way I suggest getting a set of computer speakers and using them in class. I got a set that actually has a subwoofer and it brings all mutlimedia to life in the classroom!

[Andj3w]

Thanks for all the information. It really helped.

[ko1797]

Gay title

[ChiiMak]

why is this homework for me?

[transformer156]

really great stuff! this helped me a lot with my assignment, thankyou heaps :)

[Rad631]

What are the songs used on this video? Very good explanation and examples, keep it up.

[ElttabCleon]

Like if your a student of doctor romano.

[TheRationalizer]

Charge the balloon by rubbing it with what?