7. Padlock Hole
If you look at a padlock closely, you'll notice that there is a little hole at the bottom. Do you know what purpose does it serve?
Well, it allows water that gets inside the padlock to drain easily and it is also used to pour oil into the lock so that it doesn't get jammed up.
8. Why Is There A Loop In Back Of Shirt?
If you have a garden-variety shirt, this tip won't apply. If you have a collared shirt, there must be a loop at the back. We all need to thank the Navy for it as men in the Navy had loops at the back of their shirts so that they could easily hang them on hooks.
After that in the 60s, it became common among college students to prevent their shirts from wrinkles. Now, the loop is used as a sign of quality and class.
9. The Cute Dimples on Golf Ball
If we go into the technicality of golf balls, they are not round and so they cannot really be called as balls. But let's not go there.
The dimples on golf balls are because some golfers realized that balls with nicks and bumps would travel further as compared to smooth ones.
10. The Role of A Hole Next To Camera
You must have looked at the camera of the iPhone and noticed that there is a little hole right by the camera lens and wondered why it is there. Well, we will discard the conspiracy theory that it lets Facebook spy on people.
In reality, it is a microphone. In fact, there are three microphones on almost every smartphone; one on the bottom edge of the phone, one under the speaker grill, and one next to the camera lens.
11. The Purpose of Arrow On Gas Gauge
After 2010, all the manufactured cars have an arrow next to the gas. As we routinely fill our cars up, we don't notice it much.
It becomes handy when you are driving a rental car and want to fill up the tank. Trust us, you don't want to go to the wrong side and look foolish.
12. The Power Cord of Apple
There are wings on your MacBook's power cord that you can pull up. They are not just randomly put there.
You can easily flip them and use them to wrap the cord around the power block.