We are surrounded by thousands of little things that we see so often that we are already used to them and do not notice them. However, they have some purpose. So listed below are some interesting examples that reveal the secrets that are invisible to us.
Cylinder on charger wire
You’ve probably noticed this little cylinder on the laptop charging cord. This very important little thing is a ferrite filter. It suppresses high frequency noise in electrical circuits.
Hole in the windows of the plane
For the window in airplanes, several layers of durable transparent plastic are used, which form a kind of “double-glazed window”. Windows can withstand enormous loads and have recently been made of high-strength acrylic plastic. Internal glasses are not as strong and are made from cheaper plexiglass. They serve for better noise and heat insulation of the passenger compartment, creating an air gap between themselves and the outer window. Therefore, there is a risk that in the event of a large pressure difference between the windows and in the passenger compartment, the internal “glass” may not withstand and burst. A small hole allows you to normalize the pressure by removing excess air from the inter-glass space, or vice versa.
Half Blue Eraser
Ask anyone why they need the blue half of the eraser, and they will surely answer: to erase the ink of the pens. This is not entirely true. Initially, this half was intended for removing a pencil from thick paper. The pink part usually leaves marks, not completely erasing the pencil, but the blue eraser removes everything.
Horizontal buttonholes
Another mystery of shirts. Have you ever noticed that the buttonholes for the top and bottom buttons are horizontal and the rest are vertical? This is because these two buttons are more likely to come undone. And the horizontal hinges will get in the way.
Small pocket on jeans
The most common answer to the question of why this small pocket is made on jeans is for wearing contraceptives there. Of course, in addition to condoms, this pocket will also fit a bunch of little things, but initially it had a very specific purpose. In 1873, Levi’s jeans were produced with a dedicated pocket for a pocket watch.
The hole in the ballpoint pen cap
Many people have a habit of chewing on a pen or cap. The hole in the cap is made in case a person accidentally swallows the cap and it gets stuck in the throat – then it will be possible to breathe through the hole until the foreign object is removed.
Material samples on new clothes
In fact, these pieces are not provided at all in order to close up a hole in new clothes. It turns out that you need to try them on how the material of your new shirt will react to detergent or bleach.
Also, read Trend Or Tradition: Why More And More Men Varnishing Their Nails
