A man bought coconuts.
After I got it to the office, I found that I forgot to ask the seller to help cut it. At this time, a colleague rushed out with chewing gum in his hand: Look at me!
Except for a hole, there is nothing 丨 I took it myself
After smashing the coconut hard against the rubbed chewing gum, a hole appeared on the surface of the coconut, but that was all. After smashing it several times, my colleague began to peel the skin with his bare hands, and smashed the exposed coconut hard against the chewing gum:
My colleague suspects that the coconut skin is too thick and affects the performance of the chewing gum, but the peeled coconut still smashes the chewing gum…丨Photographed by myself
In order to save face, my colleague was a little anxious: “The coconut can’t be opened, so… how about I try to open the coconut milk can?”
Nothing Happened丨Photographed by myself
So who came up with the legend of ” chewing gum opens coconut “? Can soft chewing gum really smash coconuts apart?
After smashing the coconut hard, the flying gum: slipped away丨Photographed by myself
Three points depend on hard work, seven points are destined
After a lot of hard work, we finally got coconuts out of chewing gum, and here’s our lab report, along with some unexpected tricks.
Experimental materials: 1 piece of coconut green 800g; 5 pieces of flake chewing gum.
experiment procedure:
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Shape 5 pieces of chewing gum into sharp cones and take 10 minutes.
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Hold the gum cone upright, holding the coconut with the tip up and the flat bottom down .
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Quickly smash the coconut into the gum.
Experiment Ethics Statement:
This protocol has been approved by the non-existing ethics committee of the Nutshell editorial department (batch number: GUOKR42), and the possibility of damage to the ground, chewing gum, coconut and the hands of the experimenters has been fully considered in the design of the protocol, and the experimental supplies (coconut juice) have been properly disposed of (split).
Experimental results:
Have a drink丨I took it myself
After doing countless failed experiments, we have summed up some experiences:
1. Choose the right piece of chewing gum , and then slowly shape it into a cone (don’t put it in your mouth to chew!), use a few more pieces. We used a whole pack of 5 pieces, if only 1 piece is used, the small cone may not penetrate the coconut.
2. If you buy the white coconut that is commonly found in supermarkets, remember to smash the coconut with the tip up and the butt down . Because the bottom of the coconut generally has 3 eyes, only 1 can be easily pierced, and that hole is used for the coconut to sprout and grow leaves.
Like this kind of hairy coconut without an outer layer, it can be opened with a light poke at the round hole at the bottom…丨Photographed by myself
How can a small chewing gum be comparable to an electric drill?
Newton or not Newton
Chewing gum, an object that is soft when it is soft and hard when it is hard, has a very advanced name: non-Newtonian fluid .
Non-Newtonian fluid is actually a concept opposite to Newtonian fluid.
Simply put, a fluid like water, no matter what kind of force you apply, still flows. That is, the “viscosity” of a Newtonian fluid is constant and unaffected by the applied force (but is affected by temperature).
But the “fluidity” of chewing gum is affected by external forces: gently pinch it to make it change into different shapes, and tap it hard to make it “quiet,” a somewhat counterintuitive property of non-Newtonian fluids.
When a lot of sudden pressure is applied to the gum (smashed with a coconut), the gum will quickly become hard enough to penetrate the coconut shell.
There are actually many non-Newtonian fluids in life, such as toothpaste and ketchup. Is it possible that they can also open coconuts?
Hard is not a cow, soft is not a cow
Non-Newtonian fluids are not only thickened by force, but also thinned .
Chewing gum is one of the shear thickening fluids , as are starch solutions and slime toys.
And ketchup, which can’t be poured out, is a shear-thinning fluid if it is thrown out with force. When you shake the bottle of ketchup vigorously, the ketchup inside is “thinned” by the force and rushes out.
Canned ketchup is just for embarrassment…｜Gifer.com
Quicksand, like ketchup, is a shear-thinning fluid. Therefore, if the legs are caught in the quicksand and difficult to pull out, a self-help method is to shake one leg hard, and the quicksand can be pulled out when the quicksand becomes thinner, and then use the same method to pull out the other leg.
Toothpaste is more special and belongs to Bingham fluid . This fluid has a “threshold” where it goes from a solid-like state to “flowing” when you push beyond a certain amount. Just like toothpaste, if you don’t squeeze it, it will “not run”.
Non-Newtonian fluids are actually a big family, and not all non-bovine substances can be used to open coconuts. A shear-thinning fluid like ketchup will only become thinner with force.
But we did try the ketchup, and the mushy ketchup couldn’t even pile up the small cones… Prevented the office from turning into a murder scene (the leaders would thank me)!
Author: Owl, Small Towel
Edit: You Shiyou
Source of cover image: Taken by myself
Mai Mai also contributed to this article
an AI
Well, we’ve also tried using cornstarch (a shear-thickening fluid like chewing gum) to crack coconuts, but…
The hard-pressed spire melted as soon as it was loosened… Who was the first to discover that chewing gum could be used to open coconuts?
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