Viscosity experiments for kids – The famous experiment
Liquid fixed times
Water splashes when you jump in or if you purely with his fist strikes. It makes you wonder: Is this really true of all liquids? And who “Wissen macht Ah!” known suspects already: No! This is not always the case! Try it out:
For this viscosity experiment for kids you need:
First, you should interpret your surroundings with newspapers, so you do not complete allspills. Now pour a glass of corn starch into the bowl. Now slowly pour this water. The whole is always nice gently stir with your finger. Do not stir too quickly – the slower it comes, the betterit works. Let the mixture does not become liquid. It should be mushy. If it is to get liquid poursmore easily after a bit of cornstarch.
Now take a handful of porridge and rolls it into a ball something that you should press down firmly and roll fairly quickly. If ye long as the water-cornstarch mixture under pressure rolls, it’spretty tight. Hear her on to roll, it runs you through the fingers back into the bowl.
How can that be?
The cornstarch-water mixture is a so-called non-Newtonian fluid. This term goes back to SirIsaac Newton. He lived from 1643 to 1727 and was an eminent physicist. Non-Newtonianfluids behave differently than water, and apparently most other liquids, which are calledNewtonian fluids.
The difference can be seen when pressure is exerted on the fluid: for example, the punchinto the water. The water is always the same liquid and sprayed in all directions awaybecause the pressure it displaces. It says: The water always has the same viscosity. The viscosity describes how viscous a liquid. Water has such a low viscosity and is fairly liquid,and oil has high viscosity and is more viscous.
For the non-Newtonian fluids change these same viscosity, depending on whether pressureis exerted on the liquid. When corn starch-water mixture, the viscosity increases underpressure. The result is that the mixture is more viscous, the more you push. There are alsonon-Newtonian fluids, since it’s the opposite: for example, blood. The more pressure is applied, the smoother it is! So it is better to flow through tiny capillaries in our body …