Some of the everyday things we use and see are also useful in some other ways but due to negligence most of those uses are not even noticed. In this article, we’re going to be revealing 7 common things you didn’t know were useful
1. Remember the hole at the tip of the lid of the ballpoint pen?
A lot of people think the hole in the cap of a ballpoint pen is there to keep the pen from drying out, or that it’s there to keep a pressure balance that prevents the pen from leaking. The real reason it’s there is much more straightforward:
It’s there to lower the risk of suffocation. If a small child was chewing on the cap and choked on it, the hole keeps their airway from closing up entirely.
2. Ever notice the little holes in the windows of airplanes?
That little hole is there for two reasons:
The first reason is to compensate for air pressure. When the plane climbs to cruising altitude, there’s a huge pressure difference between the inside and outside of the plane. The hole is there to regulate some of that difference so that the outer window doesn’t have to do all the work.
The other reason is that it prevents the windows from fogging up.
3. How About that Little Pocket on Your Jean?
The purpose of that little pocket is obvious to any Wild West cowboys or 19th-century gold miners reading this. It’s where you kept your pocket watch when jeans were first invented.
4. The Hole in the Handle of Your Pot Has Other Uses Too
Sure, the main reason that hole is there is for hanging up your pot, but next time you need to set down a messy cooking spoon you’ll know exactly where to look.
5. What About the Arrow beside your Gas Guage
Maybe you’ve never even noticed it before, but that little arrow is secretly the most convenient feature on any car. It indicates which side of the car the gas cap is on. Believe me, it comes in handy when you’re driving a rental car
6. Ever Notice The Little Hole at The Bottom of A Padlock?
That little hole is there for a few reasons. The first is that it lets water drain out of the lock if you’re using it outdoors, so it won’t rust in the rain or freeze and break in the winter. The hole can also be used to oil the lock to keep it working well.
7. The Thick Bit Found on Many Cables
Those little cylinder-shaped lumps are ferrite cores or chokes, and they’re essentially just chunks of magnetic iron oxide that are there to suppress high-frequency electromagnetic interference.
Have you ever heard weird interference when your cell phone goes off too close to a speaker? Well, ferrite cores are there to keep that from happening to your monitors, power supplies, and everything else.