Have you ever wondered why there's a small hole on lock's or maybe why is
always stick as on fruit in the supermarket and if you're watching this
on a computer what are those bumps on the F and J Keys these things totally
pass us by every single day but they're secretly genius I'm Charlie and today
we're going to look at everyday things you never knew had a genius purpose but
before we get into it why not subscribe and press the notification bill to
coming up first is hole in logs take any padlock and look at the bottom of it
you'll see next away you insert the key there's a small round hole you may have
never noticed it but there are two genius reasons as to why V is added on
every padlock the first is to let water drain out if you use it outdoors this
prevents it from getting rusted or frozen up in rain or snow but the other
function is you can pour oil into the hole this allows the lock to keep
functioning properly so if your keys not working in your padlock then pour some
oil into this hole and it should start working again straight away next up is
fruit stickers go to the supermarket and a lot of fruit will have a small sticker
on it you may think this is simply saying the brand of fruit but that's not
the case in fact it has some very important information which is critical
for your health this stickers on fruit do mark the
country they're from and the producer but if you know what the numbers on the
stickers actually mean if there are four digits and the first number is 8 4 this
means it's been sprayed with pesticides this is to kill any insects on the fruit
but they're thought to be bad for you too so if you see a sticker like this on
fruit you may want to avoid buying it however if there are five digits and the
first is a nine then the fruits been grown organically this means you have
nothing to worry about except maybe the price tag and if there are five digits
and the first isn't eight then the fruit has been genetically modified you don't
know where these seeds could have been made and they could be bad for your
health right now there's a lot of debate about GMO foods but a lot of people are
very skeptical next staff is keyboard firms are you watching this video on a
computer if so then look down to your keyboard
and you'll notice two bumps these bumps will be on the F and J keys on any
keyboard you probably feel these from time to time
when you're typing but like most people you've probably never given them a
second thought because there are in every keyboard they date back from when
people were transitioning from typewriters to computer keyboards the F
and J Keys are considered the home keys and the bumps are there to let your
hands find the home position without taking your eyes off your screen
nowadays because every kid uses computer so much they can touch type naturally
but 10 or 20 years ago very few people could type without looking at their
keyboard at the same time next up is chunky part of cables I'm sure you have
some cables lying around your room some will be streamlined and thin but some
will have chunky bits right at the end of them so what exactly is that cylinder
shaped lump you get on many cables they are called farad cores or chokes and
inside they contain magnetic iron oxide this suppresses any high-frequency
electromagnetic interference a good example of why these are needed is when
your phone rings close to a speaker you get that very annoying sound because of
the electromagnetic interference wellthey magnetic iron oxide inside
these chokes stops that happening to your computer screen and other power
supplies if it wasn't for these then all of our technology would be acting up and
glitching out next up we have dimples on golf balls if you've ever played a round
of golf you'll know that every golf ball has lots of dips all over it some think
these are simply for style or maybe grip but that's not the case at all
in fact when golf balls for first invented they were totally smooth but
over time players realized that the best wools were old that's because they've
been worn in and had all of the best properties for a long time the first
ever golf players would use old scuffed and cracked balls manufacturers of golf
balls then noticed that players were doing this so they began producing
artificially aged balls the dimples act as artificial aging as if the balls been
smacked around a bit the dimples allow the golf balls to be more aerodynamic
the average golf ball has 336 dimples and this has a very positive impact on
the balls trajectory and flight next up is saucepan holds look in your
kitchen and you'll see some sauce pans but what exactly is that hole in the
handle of every saucepan many think this is to hang it up in a rack but that's
not the case that is what lots of people use them for now but the original reason
why you have holes in saucepan handles is to put a spoon in when you're
stirring some food in the saucepan you don't want to put your spoon down on the
counter making it dirty and you also don't want to leave it inside the
saucepan because it may fall into your food so instead that next time you're
cooking it propped the spoon up using the whole of the saucepans handle next
up is doughnut holes everyone loves a tasty doughnut they
were first invented in Germany but their most popular in the United States go
into a bakery today and you can see doughnuts
in any shape and size but in the past that was not the case it used to be very
hard to get the edges and middle of a pie equally baked so that's why Baker's
came up with this doughnut shape so it didn't cause any problems thanks to the
hole there was no middle of the pie this meant it would all be evenly based and
that's why we have holes and doughnuts today next up is dart next to iPhone
cameras if you're watching this on an iPhone flip your phone over you'll see
the camera lens the flash and then a mysterious black Dart
you may have wondered what exactly this hole does well really it's simple it
records audio you may notice that when you film with an iPhone the audio sounds
pretty good but then when you're having a phone call
the audio sounds way less clear that's because your iPhone has two different
microphones one for you to speak to other people with on a phone call and
the other one which you can use when filming with your rear camera and
finally on the list we have converse holes you may have heard some rumors as
to why there's two holes in the side of every converse to some say it's made to
keep athlete's feet more cool of course converse shoes were invented for
basketball players but those holes are not designed to keep your feet cool
while playing on the court they were actually put there so that basketball
players could tie their laces around differently specifically in a way that
prevented them from slipping over on the basketball court specifically in a way
that prevented them slipping over on a basketball court this
is a pretty interesting detail and although it's pretty outdated now it's
such an iconic design confers still make them like this but now it's time to make
your voice heard vote in the poll in the top right corner which was the most
interesting thing you never knew the purpose are if you want some more
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