3. The Bump At The End Of A Laptop Cable
The bump at the end of your laptop cable known as ferrite beads is not there to distract you or mess up your day. It is not just there for fun but serves a good purpose. It is there to prevent interference in the cable.
2. The Hole In Airplane Windows
If you’ve flown on a plane before and sat close to the window, you will notice there is a small hole in the plastic glass covering the windows. That hole is meant to allow air to flow into the plane and also to regulate the pressure in the plane.