Often it's the simple things that can bring us the most joy, take for example cornflour. It's a common ingredient in a lot of kitchens and sometimes gets overlooked.
But when you add water, you have your very own non-Newtonian fluid to experiment with. Really it's that easy and simple - cornflour and water.
A non-Newtonian fluid is just the name for a fluid that doesn't behave as we'd expect.
Any force applied into the mixture, whether from stirring with a spoon or by prodding it with your hand, causes the liquid to temporarily solidify.
This is said to happen because the cornflour particles suspended in the mixture are very close together, so any impact causes them to compact together.
The way I think of is like a crowd at the entrance of a sports stadium. The crowd are free to move up to the entrance and when inside are also free to move around. But should anything cause the crowd to all rush at the same time (like an announcement of free beer), then the resulting queue of people would temporarily become a solid blockage to the rest of the crowd.
Visually I think the non-Newtonian fluid experiment is nice to see, but if you don't try it yourself then you miss out on the experience.
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