1. Tiny hole in airplane window.
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The tiny holes are for two reasons. One is to compensate air pressure as when the airplane climbs to high altitude there is huge pressure difference between the inside & the outside of the plane. The second reason is that it prevents the windows from fogging up.
2. Car Headrest.
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One another use which majority of us are not aware of. If your gets submerged in water you can detach the headrest & can use the metallic part against window to break it.
3. The blue side of eraser.
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Never knew that the blue part of eraser has always been for which we used to write on the wall or on any hard surface & the red one was for which we used to write on paper.
4. Black hole between flash and camera.
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The tiny hole is a microphone which record the ambient noise, not your voice, because when we take a picture our positioning is pretty far from the mouth during that time.
5. Hole in pen caps.
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Honestly I never bothered about the hole in the cap, but my friends used to make their own assumptions that hole is there for air passage to keep the pencil drying out but the real reason behind this is different.
6. Cylinder on the laptop charging cord.
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The little cylinder part is actually called ferrite bead & plays an important role in keeping your laptop running. Every small parts inside a laptop run because of radio frequencies. The cylinder has chunks of magnetic iron oxide which stops the radio frequencies from interfering with each other.
7. Loop on the back of a shirt.
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Back in the days when there were no wardrobes, these loops were used to hang a shirt without getting wrinkles on it. But nowadays after arrival of wardrobes & lockers these loops serve like a decorative design.
8. Holes in your converse shoes.
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The holes in your converse actually have two very specific purpose. The first is to provide a little ventilation to your feet as the holes allow air to circulate around & the second purpose is for bar lacing, this allows your shoes to be tighter around your feet. Is this article helpful for you guys?