Non Newtonian Fluid

Note: I really HATE all the adds here but the info is good.

(fluid mechanics) A fluid whose flow behavior departs from that of a Newtonian fluid, so that the rate of shear is not proportional to the corresponding stress. Also known as non-Newtonian system.



CAVEAT! 
1) I have no control over the lettering superimposed over this video.
2) Let me be clear ~~~>  I do NOT recommend any other videos by this  young man. -- I include this one only because it is harmless and it demonstrates a simple science experiment that introduces  non-Newtonian properties that are easily experienced. AGAIN, I do NOT recommend any of his other videos.

THESE I DO RECOMMEND:
•  Mythbusters Season 4 Disc 1 
• AND!!  Learn about the nature of fluids

FLUIDS IN GENERAL!

Kitchens are full of fluids you might never have known were there. A fluid can be a liquid, gas, solid, or even plasma. 

Viscosity is a measure of the resistance of a fluid which is being deformed by either shear stress or tensile stress. In everyday terms (and for fluids only), viscosity is "thickness" or "internal friction". Thus, water is "thin", having a lower viscosity, while honey is "thick", having a higher viscosity. Put simply, the less viscous the fluid is, the greater its ease of movement (fluidity).^[1]
Viscosity describes a fluid's internal resistance to flow and may be thought of as a measure of fluid friction. For example, high-viscosity felsic magma will create a tall, steep stratovolcano, because it cannot flow far before it cools, while low-viscosity mafic lava will create a wide, shallow-sloped shield volcano. All real fluids (except superfluids) have some resistance to stress and therefore are viscous, but a fluid which has no resistance to shear stress is known as an ideal fluid or inviscid fluid.
The study of flowing matter is known as rheology, which includes viscosity and related concepts.





SOURCES:
http://www.answers.com/topic/non-newtonian-fluid
http://video.answers.com/learn-about-the-nature-of-fluids-83227076
http://www.youtube.com/watch?v=i_2u0fV3qTM&feature=channel

 

Experiment - Making Ferro Fluid (Magnetic Fluid)

Milk Fat Experiment

Momentum and Marbles

MOMENTUM

Inertia means that a rolling ball on a smooth, level surface will roll forever if nothing stops it.

In fact, friction and air pushing against the moving ball will eventually bring it to a stop.

But interesting things happen when a motionless object gets in the way of a moving one. Try this and see for yourself.

1. Tape the yardsticks to a tabletop so they're parallel and about 1/2 inch apart.
2. Put 2 marbles in the middle of the sticks (our 'track') a few inches apart.
3. Flick a marble so that it rolls and hits the other one. 

Notice that the one that had been rolling stops while the one that had been still now rolls!
The momentum of the rolling marble transfers to the other one, stopping the first and setting the second in motion.

1. Now put two marbles on the track so they touch, and a third several inches away. 
2. Flick the single marble into the other two. 

Notice that the rolling marble stops, the middle one stays put, and the third one rolls. The momentum went through the second marble into the third.

Try other combinations: two marbles into three still marbles, or three into three. You'll find that however many marbles you set in motion, the same number will be made to roll when they're hit.

This experiment introduces 3 concepts about and momentum :

• Momentum can transfer from one object to another.

• Momentum can pass from one object, through a second, and into a third.

• The total amount of momentum at the beginning will stay the same.

EXPERIMENT SUPPLIES
Supplies: Yardstick, Marble