Experimenting with Oobleck has become one of the greatest trends this year. People are filling their pools with this fluid and walking on them. Yes WALKING. The name Oobleck makes it sound expensive. But Infact, it is just a mixture of cornstarch and water.
So, what is this Oobleck? It is a non-Newtonian fluid that exhibits both solid and liquid characteristics. As opposed to Newtonian fluids which display the same viscosity despite the amount of force applied, the viscosity of a non-Newtonian fluid changes depending on the punch.
Why is Oobleck called well…Oobleck?
The origin of its name is quite interesting. The substance’s funny name comes from a Dr.Seuss book called Bartholomew and the Oobleck. It depicts the journey of young boy named Bartholomew, who must rescue his kingdom from a sticky substance called “Oobleck”.
Oobleck is primarily a suspension of cornstarch and water. If you keep the fluid in motion in your hands, it will form a solid ball until you release the pressure after which it flows out between your fingers.
Why does it behave like that?
Cornstarch granules are bigger than water molecules. When still, water is uniformly distributed around the cornstarch. But under sudden movement, the starch granules push out the water molecules and friction between them increases dramatically.
If you are really bored during summer and have no interest in picking up a hobby, try a hand at punching Oobleck.As mentioned above, oobleck can be prepared with 2 parts of cornstarch or custard and 1 part of water.