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00:00Leaving your valuables or a chocolate bar in a car is a no-brainer.
00:04But there are other things people often overlook.
00:08Here's what to watch out for before leaving your car.
00:11Number 1 is aerosol cans.
00:14Hairspray, deodorant, spray paint, household cleaner and that sort.
00:18On the back of these cans, you might notice a storage temperature recommendation.
00:22Well, stick to that.
00:24Here's what can happen.
00:26Since these cans are pressurized, they become more sensitive to temperature.
00:31What's inside the aerosol may expand and this may result in a crack and then the can can blow up.
00:37Temperatures above 100 degrees Fahrenheit are already alarming and it can easily get as hot as that in your car
00:44on a warm summer day.
00:46Researchers from the USA have figured out how long it takes a car to turn into a sweat factory on
00:52a hot day.
00:56Within 1 hour, the insides of the car parked in the sun reaches 95 degrees Fahrenheit or hotter, with an
01:03average temperature of 116 degrees Fahrenheit.
01:07So, if you want your car in one piece and running, take aerosol cans with you.
01:14The second item is sunscreen.
01:18Sunscreen is vital for your skin since it decreases the risk of skin complications and prevents skin aging caused by
01:24the sun.
01:26This includes wrinkles, sagging and age spots.
01:30But when you leave sunscreen in your car, it gets exposed to high temperatures and it can ultimately shorten its
01:36shelf life.
01:36If you end up finding spoiled sunscreen, you might notice a funny smell when you open the cap.
01:42Plus, the heat might cause the cap to open and the sticky substance will get all over the car.
01:48The same rule applies to lipsticks and other cosmetics as well.
01:53The next one is plastic bottles.
01:57There are two reasons why you shouldn't leave them inside your car.
02:00Firstly, a plastic water bottle can act as a lens, magnifying the sun's rays and starting a fire.
02:08A fire department in Oklahoma conducted an experiment and confirmed that the danger of fire was real.
02:15David Richardson from that department says it can happen if the beam of light is focused enough.
02:21The second reason is related to your health.
02:23Many plastic bottles contained by sphenol, a potentially toxic compound.
02:28The BPA levels can increase at high temperatures and that can be harmful to your body.
02:34There's a chance that this chemical can get into your drink after you leave the bottle inside the vehicle.
02:41Oh, and batteries.
02:42They could lose their capacity to work at full power when they're left abandoned in the car.
02:47You can buy a new pair and fix this problem, but it won't be as easy to solve the problem
02:52of leakage or a rupture.
02:54It can be bad for your health because battery acid is dangerous when inhaled and highly corrosive.
03:01The reason for leakage is again related to high temperatures.
03:05Battery manufacturers recommend keeping their products at room temperature.
03:11This fact is partially related to batteries.
03:13It's about electronics.
03:15Have you ever realized how hot your phone can get when it's exposed to the sun?
03:20You're driving and, let's say, looking at the GPS on your phone.
03:24Even in this situation, your phone can heat up.
03:27What will happen to it after hours of sun exposure?
03:31Phone companies are strongly against customers leaving their devices in vehicles
03:35because they might shut down, get damaged, or, you know, boom!
03:41Personal belongings are another priority on the list.
03:44A wallet or a handbag may come to one's mind first.
03:48Yet, a passport or even some change you leave near the passenger seat is sometimes enough to attract a thief.
03:55Better to keep such stuff out of sight, for example, by storing it in the trunk instead of leaving it
04:01in the back seat.
04:04Number 7 is also related to theft.
04:06Life can be too hectic sometimes.
04:09And it's understandable if you can't clean your car frequently.
04:12But leaving garbage in the car is another mistake.
04:15Thieves tend to search for messy-looking cars.
04:18They think that the owner doesn't use such a vehicle frequently.
04:23How about plants?
04:26I know it isn't that common to keep plants in the car on a daily basis, but sometimes you need
04:32to move them.
04:32The heat inside the vehicle can easily dehydrate the poor thing.
04:38Medications are another thing you shouldn't keep in the car for too long.
04:42The constantly changing temperatures inside the vehicle can decrease the effectiveness of your pills.
04:48Authorities recommend keeping most medications at 59 to 77 degrees Fahrenheit in a cool and dry place.
04:57Important documents that contain your personal data shouldn't be left in the vehicle either.
05:02Some examples of such documents are tax forms, financial statements, and school transcripts.
05:08A thief could commit fraud or identity theft using this valuable information.
05:14And there's also food and drinks.
05:17Experts recommend not leaving groceries or leftovers in a warm car for more than two hours,
05:22or only an hour when it's over 90 degrees Fahrenheit.
05:26The same rule applies in the winter too.
05:29Canned foods, for example, have a high risk of going bad if a can of sweet peas, let's say, gets
05:36frozen in the car.
05:37The effect will be similar to what would happen to soda.
05:40Let it thaw in the refrigerator instead of leaving it at room temperature.
05:44If the product doesn't look or smell normal, throw it away in a place where not even an animal can
05:50find it.
05:51Don't try to taste it, just trust your senses.
05:54If the item seems rusted or there are some cracks in the can, it should end up in the trash
05:59too.
06:00Eggs are another example.
06:02Normally, eggs shouldn't be frozen.
06:05But let's suppose you forgot one grocery bag in the trunk of the car,
06:08and the weather was so cold at night that the eggs got frozen.
06:11Keep the eggs in the refrigerator before use.
06:14They should be hard cooked.
06:16It's your only option.
06:17You see, freezing causes the yolk to become thick and syrup-like.
06:21It loses that natural flow and doesn't mix well with other ingredients.
06:28You shouldn't leave your pets alone in the car, obviously.
06:31And not just because of a potential rise in temperature.
06:34They will feel uncomfortable without you, their best friend accompanying them.
06:39In their frustration, they might do something to get noticed,
06:42which can be, for example, ruining the interior of the vehicle.
06:48Now let's return to the winter season again.
06:50If possible, keep the gas tank of your car over half full.
06:54This can prevent the fuel lines from freezing.
06:56It also makes it easier to start the engine and hit the road in the morning.
07:00While keeping an eye on the fuel bar, it might be a good idea to glance at the tire pressure
07:05too.
07:06The cold can result in tire pressure drops.
07:11Not only high, but also low temperatures can damage some items.
07:15A good example is paint cans.
07:17They should be quickly taken out of the vehicle in the winter.
07:21The ingredients in the paint can experience expansion, separation, and clumping due to the cold.
07:27In other words, you won't be able to use this paint anymore.
07:32Weather also affects wooden musical instruments like violins or guitars.
07:37Changes in temperature and humidity can cause wooden instruments to warp, crack, or split.
07:44Glasses get affected by fluctuating temperatures too.
07:48In a hot car, plastic frames can bend.
07:50Or plastic can become brittle when it's very cold.
07:54This makes glasses prone to breaking.
07:57Don't leave house keys and garage door openers inside the car.
08:01This is an everyday practice for many people, but it's risky.
08:04They can get into the wrong hands.
08:08To listen to music, most people connect their phones to the car or listen to the radio.
08:13CDs are getting less and less used these days, but don't leave them in the car anyway.
08:18They might get warped, and you won't be able to use them anymore.
08:22Can you think of any other items you shouldn't leave in the car?
08:27Some pieces of clothing come with a small patch of fabric with a button on it.
08:31While it's quite obvious how to use the button, the fabric's purpose isn't so apparent.
08:36It's not there to patch holes.
08:38You're supposed to test your cleaning products on it.
08:41Then, if something goes wrong, you won't ruin the whole garment.
08:44The seemingly random dime-sized hole in the elevator door is actually a keyhole.
08:50If the elevator doors get stuck, an operator can open them manually by inserting a special key in this hole.
08:57The same tool is used when an elevator needs routine maintenance.
09:01Some plastic milk containers have dents in their sides that serve several purposes.
09:05For one, if milk spoils, this process can cause swelling and high-pressure buildup inside the container.
09:12That's when the dent comes in handy.
09:14It pops out and doesn't let the jug blow up.
09:17Plus, if you decide to freeze the milk, it'll expand like any other liquid.
09:21And then again, the indentation will pop out and prevent the container from bursting inside the freezer.
09:27A first-timer might think that Chinese takeaway boxes have a peculiar shape.
09:32The more experienced diners know that by unfolding the sides of these containers,
09:36you get a paper plate with the food already sitting on top.
09:40The lines on plastic solo cups can help you measure out liquids and non-liquids too.
09:45From the bottom up, those lines coincide with the measurements of 1, 5, and 12 ounces.
09:51The lowermost line is the perfect portion of mouthwash.
09:55The middle one is a serving of cereal for breakfast.
09:58And the topmost is the amount of water recommended to drink 4 to 5 times a day.
10:04Striped toothpaste will always come out in stripes even if you mash the tube with all your strength.
10:09No magic involved though.
10:11The product is very dense and viscous, so it doesn't mix well.
10:15The white, blue, and red parts of the toothpaste are pushed down at an even rate
10:19thanks to their similar physical properties.
10:22And viscosity helps the stuff be pushed down and out from the edges first,
10:26so no matter how hard you try, there will always be those perfect stripes.
10:31Not every iPhone owner pays attention to an almost unnoticeable little hole between the camera and the flash.
10:38It's the gadget's second microphone.
10:41It's role is to block outside noises when you're filming a video.
10:45This microphone also makes the sound clearer.
10:47Use it when you're on the phone in a noisy place.
10:50Dental floss can slip out from your fingers and tangle.
10:53To avoid such problems, tear off a piece and floss and tie its two ends together.
10:58It will be much easier to use and won't hurt your hands.
11:02Most frying pans have holes in their handles.
11:05You can use it to hang the thing on a hook on the wall, but that's not its original purpose.
11:09When you're cooking something in the pan, the hole in the handle is there to hold your messy spoon.
11:15It's especially important for plastic utensils because you can't leave them in the pan for long since they can melt.
11:22Some toothpicks have several grooves on the blunt end.
11:25When you need to use one, break off the grooved end and put it on the table.
11:29It'll serve as a rest to keep your toothpick from touching the surface.
11:34You've probably noticed that most soft-rink lids have ridges and three bumps on them.
11:39With their help, the lid can turn into a coaster once you put it on the table and place the
11:43cup on top of it.
11:44No more spillage.
11:46Bath foam isn't only for fun or a nice smell.
11:49It also helps regulate the temperature.
11:52The bubbles keep the water hot so you can enjoy a bath a bit longer.
11:56Anyway, it works for acrylic bathtubs only.
12:00Those made of metal lose heat really fast either way.
12:03Almost all measuring tapes have a metal tip with a small slot on the end.
12:07You can use this slot to hang the tape on a nail or a screw to make measurements without anyone's
12:13help.
12:13Sometimes this tip has a row of sharp points along the edge on one side.
12:18That comes in handy when you want to leave a mark without using a pencil.
12:23A pack of cotton pads has those strings on it so we could hang it on some hook or holder.
12:29And no, there's no need to untighten and tighten the pack again.
12:32Look at the bottom of the pack.
12:34It has a perforated line.
12:36Tear along that and now you're good to pull out a cotton pad.
12:40A triple handle on a jerry can is there to make it easier for two people to carry it and
12:44distribute the fuel evenly.
12:46Gas cans often have a second hole that actually needs to be uncapped too before you pour the gas.
12:52The air passage will prevent it from pouring out.
12:55Lemons get juicier if you warm them up a little bit in the microwave.
12:59The heat softens the frozen membranes so the juice can flow out freely.
13:03More lemonade for you!
13:04When you buy some grated cheese, get ready for a surprise.
13:08If the package says it contains cellulose, it means that the cheese does contain wood pulp.
13:14Don't worry, it's digestible.
13:16It's added to prevent the product from clumping.
13:20The expiration date on mineral water isn't about water going bad.
13:25Actually, no water can spoil, but the bottle can.
13:28Over time, it starts leaking some chemicals that aren't quite safe.
13:33The spike in the cap of a tube of ointment or cream is there so you can puncture the tiny
13:37foil seal.
13:38No need to grab a toothpick or try to use your fingernails to peel it off.
13:43Post-it notes are supposed to be peeled off from the side like you're turning the page in a book.
13:48Most of us tear them from the bottom, and that just creates a crease and makes the whole note less
13:53sticky.
13:54To prevent water from boiling over, just lay a wooden spoon across the rim of the pot.
13:59It only works for a little while, though.
14:01If the spoon's surface gets heated up to the boiling point, the bubbles will just foam up and around it.
14:07That's why metal spoons won't do.
14:09They heat up too quickly.
14:11Some erasers have two colors and textures.
14:14Not for pen ink versus pencil lead, but for different types of paper.
14:17However, you're supposed to use the blue side to remove pencil marks from heavy grades of paper.
14:24Most people use bobby pins upside down.
14:26The zigzagged part goes closer to your scalp.
14:29The texture keeps the hair and pin in place much better.
14:33And give your pins a spritz of hairspray before putting them in.
14:36They'll grip better.
14:38Ever notice the tiny second hole in the lid of your coffee travel mug or to-go cup?
14:43It's there to control how smoothly the liquid flows out from the drink hole.
14:47Without it, the hot stuff would just glug out at you like milk from a jug.
14:51It also lets the steam escape so the high temperature and built-up pressure don't melt the lid or send
14:56it shooting off.
14:58Apples you buy at the supermarket were likely picked between August and November.
15:03After that, they were covered in wax, hot air dried, and stored in cool places.
15:08It takes the fruit 6 to 12 months to make it to fresh produce shelves.
15:13Sometimes, you need to get away from your computer but don't want to keep logging back in.
15:18Put your mouse over the top of an analog watch.
15:21The mouse will perceive the ticking second-hands movement, and this will prevent your computer screen from turning black.
15:28When using a blender, pour the liquids in it first.
15:31Only after adding your milk, coconut water, or yogurt, put the berries, fruit, or spinach inside.
15:38Thanks to the holes in the bottoms of earphones, air can circulate up and down through the speakers.
15:43It results in increased low frequencies.
15:46This makes the bass sound deeper and improves the overall sound quality.
15:51You can use metal loops on the sides of a grocery cart to organize the space in your cart better.
15:56Hang your jacket on such a loop or put a bag of delicate items there, like eggs or bread.
16:01This way your jacket won't get wrinkled and eggs won't get squished.
16:06The black lines on a basketball make the game easier to play.
16:11They're actually grooves, helping you handle the ball.
16:13And since the players need to move around the court while dribbling or bouncing the ball, control is crucial.
16:20The black lines allow you to grip the ball better.
16:23You can also easily steer it in any direction once it's in your hand.
16:28If the basketball was smooth, you wouldn't be able to do it.
16:31By the way, pebbled dots that cover the outside of the ball serve the same purpose.
16:36The drawer at the bottom of your stove is there to keep your dishes warm when you cook large amounts
16:41of food.
16:42When one dish is in the oven, the already prepared ones are kept warm in the drawer below.
16:48Okay, today I'll show you things you've never seen and tell you stuff you never knew.
16:54Wow, all in one video! What a bargain!
16:57For example, these soda found stations in fast food restaurants.
17:01We all see the nice side of it, but have you ever wondered where all this soda comes from?
17:06Let me take you behind the scenes.
17:08Ta-da!
17:09Turns out it's a pile of boxes with tubes.
17:12So when the drink runs out, the employees change the box and plug the tube back in.
17:18Okay, let's peek into a couple more places where we normally don't belong.
17:23This is, for example, what you will see if you cut the screen of a Mac open.
17:27And here's what's hidden behind the dryers in a public laundromat.
17:31Today, 4 out of 5 households in the U.S. have a dryer.
17:35But they weren't so widely accessible when they first appeared in the 1950s, because they were way too expensive for
17:42the average homeowner.
17:43Now, grocery shopping isn't an uncommon practice, and we all have walked past dairy fridges a million times.
17:50But have you ever wondered what's behind them?
17:52Turns out they're just shelves, and store employees stack the products from the other side.
17:57It makes perfect sense, but I never imagined it like this.
18:01Now, this photo shows what's behind the elevator button.
18:05Obviously, a bunch of cords.
18:06The buttons are all wired to a computer that manages the elevator.
18:10How does the computer know where the elevator is at a particular time?
18:14Well, there are several possible systems, but the most common one is a long vertical tape in the shaft with
18:21a series of holes.
18:22A sensor counts the number of holes that are passed, and that's how the location is determined.
18:28Okay, there are a couple of common things we all know, but the purpose of which remains a mystery to
18:34most.
18:35So, let me share these secrets with you.
18:38Those metal rivets on jeans have been there from the very beginning.
18:41Jacob Davis, the iconic man who made the first pair of jeans, added copper rivets to places where pants are
18:49most likely to rip.
18:50Today, they have more of a decorative and distinctive purpose, since they are a traditional attribute of the jeans everyone
18:56knows of.
18:58Now, I'll bet you know there are extra loops on some shoes.
19:01No, they're not for sweat or ventilation.
19:04Those are extra loops for laces, just like other loops you use.
19:08But they're there to tie your shoe around the ankle to prevent your foot from moving aside.
19:13That's especially helpful if you're hiking and ascending and descending hills and trails.
19:19Now, have you ever noticed those half-belt thingies many coats and jackets have at the back?
19:24Turns out, they first appeared on oversized military jackets.
19:28So, the extra fabric could be collected on the back, and the person doesn't stumble when working.
19:33Today, those belts are only added for the sake of style and tradition.
19:37Most clothing items you buy come with a small bag of fabric or a button, or both.
19:43These are actually not useless.
19:45Buttons obviously can be replaced if you lost the original one.
19:49Pieces of fabric can serve two purposes.
19:52You can patch up the haul, but the main purpose is to provide you with a sample of cloth,
19:57so you can use it to test different washing products on it and see what happens to the fabric.
20:02Now, pom-poms on woolen hats.
20:05Did you know that sailors were wearing hats with pom-poms in the 18th century to protect their heads in
20:11case they accidentally whacked them?
20:13Regular people were wearing them in Scotland, and the color of the pom-pom signified the person's social status.
20:20People got back to wearing hats with those cute decorative items during the Great Depression.
20:24They're made of spare yarn, so it was a cheap way to decorate your hat.
20:28Now, if you haven't noticed, some sidewalks have little plates with bumps on them.
20:34Most people don't pay much attention to them, but they're very important for visually impaired people.
20:39It signals a slope that then leads to a crosswalk.
20:43Also, several patterns signal different things.
20:46Have you noticed that the icon of a gas tank on car dashboards has a little arrow next to it?
20:52Well, the arrow has a purpose.
20:54It points at the side of the car where the gas tank is located.
20:58Very useful for forgetful people, like me, who constantly wonder which side it is on,
21:04and also for those who drive rentals once in a while.
21:07The answer is right in front of your eyes.
21:09If you can't find the arrow on your panel, then the fuel hose on the icon indicates the side instead.
21:16Now, on the back of many makeup and hygiene products,
21:19you'll find this symbol with a marking like 6M, 12M, and 24M.
21:24This is the number of months this product can serve you before you should toss it out.
21:29You might know that whistles work perfectly fine even if they don't have that ball inside.
21:35And yet, they have it.
21:36But why?
21:37Even though there's a sound without the ball, the noise it creates is very flat,
21:42and it's not distinguishable enough.
21:44When the whistle has a ball inside, then it starts moving with every blow,
21:49indicating different pitches and making the noise more noticeable.
21:53Lollipop sticks have those squared holes on the end of their sticks for a reason, too.
21:58When the candy is put on the stick, some of it goes into the hole, fixating the candy part.
22:04This way, the candy ball or whatever shape is less likely to fall off the stick.
22:09Yeah, it's a bummer when that happens.
22:12Measuring tapes have that little metal stud on the end.
22:15Most people know that you can use it to stick it to the side of the surface you're measuring.
22:19But it's not the only cool thing about it.
22:22Look, there's also a small slot.
22:24And this slot can be used to hang it on a nail, again, to free your hands and keep measuring.
22:30The bottom of the end of the tape has a ridged edge.
22:33It'll help you make a mark if you don't have a marking tool with you.
22:37Have you ever wondered why the tape's blade is curved?
22:40Well, it helps to keep it rigid when extended.
22:44Pay a closer look at the blade.
22:46Apart from numbers and markings, there are also black diamonds.
22:50Those are there every 12.2 inches, and they're useful for construction workers to space engineering joists.
22:57They can also be useful for you if you want to hang something heavy, for example.
23:02The diamond will mark the exact center of a stud, which is placed 16 inches apart from one another.
23:08And you can drill something to that center to make sure whatever you hang is safely attached.
23:14Now, most coins have ridges, and this is the legacy of the olden days.
23:19You see, back in the day, all coins were linked to a silver standard.
23:24The amount of silver used in a coin was proportionate to the value of the coin.
23:28So, the more actual silver was used to make the coin, the higher its value was.
23:33Hi-ho, silver!
23:35Do you remember the Lone Ranger?
23:36Silver was the name of his horse.
23:39Eh, never mind.
23:40Anyway, all the coins had precious metal in them, and some people started shaving off a little bit of silver
23:47from it.
23:47It wasn't noticeable on one, but if done on several, people could get quite a bit of that precious metal.
23:54So, to prevent fraud, the edges were made with ridges for security reasons.
23:59So, if someone attempted to shave it off, the ridges would disappear, and no one would accept that coin anymore.
24:05Smart!
24:06Today, no one makes coins out of silver.
24:09The coins just represent the value.
24:11But the ridges are kind of a cultural heritage now.
24:14And finally, a typical plastic milk jug often has inverted circles on one or more of the sides.
24:21Not like alien crop circles, this dimple is there to make the jug more resistant and to prevent it from
24:27erupting in case the jug falls on the floor.
24:30The dimple gives some more space for the liquid to expand.
24:33Also, as the expiration date approaches, the microbes in the milk start to expel some gases.
24:39As there are more of them trapped inside, the pressure in the jug is rising.
24:44The dimple takes care of the expansion and prevents the jug from exploding.
24:48And the cows are utterly delighted that their hard work is not wasted.
24:57Did you know that you can actually inflate a balloon without using your lungs?
25:02All you need is a plastic bottle, vinegar, baking soda, a funnel, a rubber band, and a balloon, of course.
25:11First, pull some baking soda into the balloon using your funnel.
25:15And now, pour the vinegar into the bottle.
25:19You don't need a lot.
25:20Just fill about a third of the bottle.
25:23Let's go ahead and put the balloon over the bottle.
25:26But don't tip the soda inside the vinegar yet.
25:30Secure the balloon with a rubber band and tip it over to make the soda fall into the vinegar.
25:35And now you can step back and enjoy the show.
25:38When the baking soda and the vinegar are mixed together, they release CO2 that will inflate the balloon.
25:45You can use the inflated balloon to show your friends another trick.
25:49Grab a comb and rub it on the surface of the balloon.
25:52Now you can bend the water flow in your sink with static electricity using your brand new electrified comb.
25:59Just don't try brushing your hair.
26:03Can you really pierce a balloon without popping it?
26:06The answer is yes.
26:08You're going to need a skewer or a long needle, a balloon, petroleum jelly, and some courage.
26:15Scratch the balloon with your fingers and make it more flexible.
26:18Now, blow steadily into the balloon.
26:21Stop before blowing it to the full size.
26:24This will make the trick easier to perform.
26:26Put some petroleum jelly on the needle.
26:29Now, find this darker area near the knot where the balloon is less stretched.
26:34And just pierce it all the way through the top, like this.
26:38Balloons are made up of polymer chains.
26:40They're so tiny that they seem invisible to the human eye.
26:43But this trick works because the polymer chains are less stretched on the neck of the balloon.
26:49It was enough room to allow the needle in between the chains without breaking them.
26:53But if you try the same technique on the sides of the balloon, it will definitely pop.
27:00By the way, hairspray actually helps keep the air in the balloon longer by sealing the surface.
27:06But if you apply hairspray on the outside of the balloon and then touch it when it's not yet dry,
27:11the balloon will shrivel.
27:13Isn't it magic?
27:17Beware, our next trick can make you question gravity.
27:20Pour some plain water into a glass bottle.
27:24Not much, about a quarter.
27:25Put the bottle in the microwave for a minute.
27:29Meanwhile, prepare a bowl with colored water to make the trick more visual.
27:34Take the bottle out of the microwave, turn it upside down, and pour it into the colored water.
27:39The bottle will soon begin to fill with water.
27:42Can you guess why?
27:44The air expands when it's heated.
27:46The bottle and the air began to cool down, and the air contracted, which caused the water to move.
27:54Not only wizards can make things disappear.
27:57Fill a plastic container or transparent glass with sunflower oil.
28:03Dip a glass rod inside the oil.
28:05Can you see it now?
28:07Oil and glass bend light the same way because they have almost equal refractive indexes.
28:13Therefore, it's impossible to see how the wand bends light inside the oil.
28:18To make this trick even more epic, pour equal parts of water and oil inside a glass and dip the
28:25glass rod inside it.
28:27You'll see it in the water, but it will disappear inside the oil.
28:33Have you seen this epic instant freezing trick?
28:36Here's how you can repeat it at home.
28:38Grab a small plastic bottle of clean drinking water.
28:42Leave it for about 4 hours to bring it to room temperature.
28:46And now, put it into a freezer and wait for an hour and a half.
28:50After that, take it out very carefully.
28:53Try not to shake it at all.
28:55Now, hit the bottle strongly or shake it and see what happens.
29:00Not only is red cabbage rich in fiber and vitamins, but it's also pretty useful for homemade scientific experiments.
29:08Boil red cabbage in pure water and wait until the water gets colored.
29:14Red cabbage contains a chemical called anthocyanin.
29:17It changes color when it's mixed with an acid or a base.
29:21That's why if you mix your cabbage with water with different ingredients, you'll get different colors.
29:27Bases like soda will make it blue, but acids, on the contrary, will create reddish colors.
29:33You can prove it by adding some lemon juice to your cabbage water.
29:37The water will become pinkish.
29:40And if you add vinegar, you'll get an even more vibrant pink color.
29:45If you have a juicer, you can try the same experiment with red cabbage juice.
29:50Initially, it will have a more vivid purple color.
29:53But, under the influence of additional liquids, the color will change.
29:58Can you guess which color you'll end up with if you mix cabbage juice with bleach?
30:03It's almost transparent, but still has a greenish-yellow tinge.
30:09The next trick is very trendy among artists.
30:12Here's what you're going to need.
30:13Liquid soap, cotton buds, milk, and acrylic paints.
30:17You can use food coloring for this tip.
30:20Pour a little bit of milk into a wide bowl or a plate.
30:24You don't need a lot.
30:25Then, put a few drops of paint into the milk.
30:28And now, dip a cotton bud covered with soap.
30:32The patterns will begin to change.
30:34That's because the fatty molecules in the milk get attracted to the molecules of soap.
30:39When you're satisfied with the pattern, you can put a sheet of paper on top of the milk.
30:44And voila, your abstract masterpiece is ready.
30:48In fact, this technique is related to an ancient paper marbling called ebry.
30:53Artists created colorful patterns by sprinkling and brushing color pigments on a pan of oily water and then transformed those
31:01patterns on paper.
31:05Friction helps people walk on the road instead of sliding on it.
31:08And it also allows us to perform this cool experiment called floating rice.
31:14Fill a small plastic bottle with rice.
31:17You can use a funnel to make the task easier.
31:20Shake the rice for a while.
31:21And now, try to push a chopstick or a pencil inside the bottle.
31:25If you did everything right, the stick will get stuck in the rice.
31:30You can also try using different types of grains and see what happens.
31:35Have you ever tried to put an ice cube into oil?
31:38Well, you can try today.
31:40It will create these cute little drops that will fall into the bottom of the glass because they're heavier than
31:45oil.
31:48Here's an easy way to stick an ice cube to a string without any glue.
31:53Place an ice cube in water.
31:55Put a piece of string on top and sprinkle it with salt.
31:59You don't need much, otherwise the ice will dissolve.
32:02A pinch is enough.
32:04Wait for one minute and then gently pull the string.
32:07And there you go.
32:08The ice has stuck to the string.
32:12For this experiment, you're going to need an empty, clean soda can.
32:17Turn on the kettle and wait until it begins to boil.
32:20Carefully hold the can over the kettle using kitchen tongs.
32:24It will help fill it with hot steam.
32:26When the can is full of steam, give it an ice bath.
32:30You can put it into a bowl with cold water and ice cubes.
32:34The can should wrinkle up right away.
32:37That's because the volume inside the can decreases, reducing its pressure and allowing the external pressure to crush the can.
32:45The next trick is also about air pressure.
32:48You're going to need a glass bottle, a small piece of paper, a lighter, and a peeled, boiled egg.
32:55The diameter of the bottle neck should be less than the width of the egg.
32:59And it's important to use glass because plastic can melt.
33:04Now carefully light the paper.
33:06Let it burn a little bit and drop it inside the bottle.
33:10Put the egg on the neck of the bottle.
33:12It should begin to bounce.
33:13And soon the pressure of air will push the egg into the bottle.
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