Probably me if I invent something. I just like to create something but I don't know how it work. Minecraft Redstone is one of the example I just don't know how it work a month after I finish the project.
SLS is also in most toothpastes causing them to foam up, and it also binds with your sweet taste receptors on your tongue, blocking them from allowing you to taste for a short while, which is why orange juice tastes bad after brushing.
Scientist: "Hey, mom, I published a new peer-reviewed paper today. My colleagues and I finally figured out how washing machines work." Mom: "Well, it's about time. You certainly never knew how one worked when you lived at home. Maybe you should study how vacuum cleaners work next."
It’s not that hard to exploit a phenomenon. We still don’t fully understand how friction or airplanes wings work, but we use them all the time with great skill. All we need to know is what conditions cause the phenomenon, and then a lot of testing.
@@aaaadit5155 enko schools me ye science nahi samjhai jati, it's left for there undergrad and higher studies 😏😏 hamare pass upper hand hota hai enke common public se 😏😎
You actually finally explained to me why a stuffed washer is not a good thing, leaving clothes feeling and smelling half-washed. Given that they don't have enough room for the clean water reaction you mentioned, it now makes perfect sense.
@@evilsharkey8954 apparently it's canon that wizards would poof away their excrement instead of going to the bathroom... laziness leads to creativity, I guess
Cardinal rule of washing: "The rinse is more important than the wash." I've been practicing (and occasionally teaching) how to clean things: surfaces, clothes, kitchenware, and food. I'm totally unqualified, other than that I experienced a pesticide poisoning in 1980 and was taught some cleaning techniques to remove chemicals from my environment due to the resulting chemical sensitivity. This did however give me the impetus to further investigate cleaning methods. When I wash my clothes, I run them through an entire second wash; your video helps explain why my clothes end up so clean and with that fresh air smell! At the end of this vid, you mention your big concern is that the clothes smell fresh. Let's investigate that for a moment: What creates smell? Molecules in the air are breathed in and pass by the olfactory (smell) bulb deep in the nose. These molecules interact with chemicals in the bulb, resulting in stimulation of nerves--you get the idea. The key component of this is the idea of molecules in the air. In the case of clothes, where do these molecules come from? If there is anything on the clothes that can evaporate and subsequently trigger a smell perception, then this means there has to be something on the clothes for it to evaporate. Most laundry products, including detergents, softeners, anti-static sheets, and even some bleaches have fragrance added. Some so-called fragrance-free products even have what is called a "masking fragrance"; check the ingredients! If your washed clothes has that "fresh air smell," what you are smelling is a residue left on your clothes after the washing. In other words, your clothes are not actually fully cleaned! Properly cleaned clothes have no odor, with a few notable exceptions: natural cotton fibres will outgas (place molecules in the air from a surface) some of the residual oils inherent in the cotton plant; synthetics such as nylon and polyester may outgas some of the chemical residues left over from the manufacturing process. A sensitive nose may be able to smell these; they mostly have, especially in the case of cotton, a non-offensive odor, and for some, especially in the case of cotton, may actually be considered a pleasant "fresh air smell." Carefully choosing laundry products with little or no fragrance is another step in ensuring that your clothes are properly cleaned and potentially have a true fresh air smell after their visit to the washing machine.
50 years ago my mother taught me the rinse cycle was more important than the wash. Use a small amount of soap unless the clothes are greasy, then rinse with copious amounts of clear water; even rinse twice sometimes.
As someone who delivers and installs washing machines, I actually appreciate this video. Now if you can do one for ‘steam drying’ I could then explain it to our clients.
I bet we still don't know how electricity truly powers our machines. I mean, sure, you can describe what it does down to the subatomic level but how it does it? No chance!
It's possible to know, through testing, that something works without knowing how it work. Knowing *that* something works only requires data. Knowing *how* something work requires theory.
Dominic H. What do you mean? That doesn’t make any sense. I mean, from a philosophical perspective, we could argue that we know absolutely nothing about the world, but from a scientific perspective it’s very clear how electricity works thanks to Maxwell and company.
I don't blame em'... I also didn't know how it worked until i moved out of my parents basement. Can't wait until they figure out the clothes iron! Let alone the crock pot...
This episode just made me relive the time my first college boyfriend informed me that he had been doing all of his laundry for the past 2 years without any detergent at all because he "didn't realize he needed it". That honestly should have been more of a red flag than it was at the time...
I'm not sure what I found funnier, the fact that he wasn't using laundry soap for 2 years or that he didn't know he needed to. Its called laundry soap right? Its function seems obvious from its name ... unless he didn't know what the word soap means?
I applied this new discovery to washing my car and found that rinsing it after i washed it makes it so much cleaner. I must be a genius. My mother would be so proud.
Could you do a video on topics like this, that seem so fricken simple, and are so commonplace, but are unsolved? These kind of things are really unheard of before they get solved, I think it would be cool because someone watching your video could solve an unsolved problem they otherwise most likely would never know about.
More of a quality comment here - I haven't watched Sci Show in quite a while and the last video you actually presented. I went back to the old one and then watched this one since it was on the feed and the difference between them is astonishing. You seem way more comfortable presenting now than you used to. Tell the guys you want more screen time! Whatever you're doing is working!
*Everyone:* waits for new findings on chronic and terminal diseases, climate change, finding a habitable planet for the future of humanity etc *Scientists:* We figured out how washing machines work
@@numnut1516 to the scientists working on the "study" on something everyone already knows yet cant seem to work on "important" issues like cancer, climate change, and etc etc
@@warburk Did you skip the part at the end of the video where she explains that being able to make more efficient washing machines would actually be a pretty big deal?
Wow i love this. This is like that paper that described coffee rings. Sometimes it’s in these seemingly ordinary everyday things that major discoveries and revaluations happen and can have wide ranging impact.
@3:10 Theword "Colloidal" is pronounced such that is sounds like "Collide- al". I believe that middle syllable is normally pronounced "oi" similar to void, droid and roid. I loved the video though. Fascinating. Thank you for making it.
Brenden Roughley I’ve got no clue but i just think she’s doing a good job. Im learning a lot and I appreciate the female voices in the science realm. Her energy is glowing. Her impact is important and appreciated. I wish her well.
This is actually a very important finding. Basically you can save up on detergent and water just by soaking clothes in a more saturated soap solution by using less water. Then just expending the energy and water usage for the rinse cycles.
So many modern washers only have cold water rinse. ..if it has hot water rinse...it would be better? Why does drying on cloth line form lots of wrinkles; while cloth from dryers have much fewer wrinkles? (Do people today even know what a “cloth line” is???)
Aside from the clickbaity title, this video perfectly showcases how science works. Everyone can understand that washing machines are good at washing clothes, but the scientists here were trying to better understand the 'how' (and eventually the 'why') these things happen. Most people would have no problem saying that they absolutely know how a washing machine washes, but not scientists. They work tirelessly on seemingly simple things to bring us to a conclusion of absolute certainty. Now we all have the best working knowledge on how things are the way they are... or at least why washing machines work! Very informative
Two things: Washing machines in Germany can take up to 4 hours for regular cycles. I thought that was because they also need to heat up the water (usually no hot water intake) but I also had the feeling the clothes were cleaner coming out. Made sense, longer contact time of soap and water = cleaner clothes. Nice to hear a more scientific take on that. Now here in the US, I always added the extra rinse cycle (when possible), but mainly because I thought it would help the soap to be removed more efficiently. Never thought it would be the actual part of the washing that takes out the dirt. You never stop learning!
That's ridiculous 40 Degrees washing is warm enough Also that amount of time(4 hours) is just stupid Also machines with cold water intakes only are 100% efficient and you won't find any modern machine that has a hot water inlet Modern washing machines contain only a cold water intake
I used to explain myself using the Entropy theory, high concentration - > low concentration molecular movement during the rinse phase. Never knew this was not figured out.
This seemed like a really odd post when I first saw it. Basically, I was trying to figure out how something could exist for a century or more, and nobody understood how it worked. After watching the video, I understand, but it still seems strange that nobody ever worked out the physics of it till now. Makes you wonder how many other things we use every day are also a mystery to science.
Wow! My grandmother, use a little soap. She cleaned rinsing the clothes was the most important part. Soup left Ian, she said yellowed your clothes. I remember her, and the ringer washer she used. When rinsing the clothes she would periodically take up fabric and suck on it. If she detected soap, it was rinsed again. Of course she had no idea how close she was to being right. She did not know the science. She also used a lemon juice to bleach clothes. Hang them all to dry. Once again, she worn too much would also turn your clothes yellow or brown.
I work in an industrial clean room where we have to clean our product very precisely. Too little surfactant and the clean process has to be repeated (wasted time and resources), too much and it is possible to cause expensive damage to the product. The concentration testing of surfactant in water is tested electrically by simple electrical resistivity. And it occurs to me: a home washing machine could do the same thing automatically. It would have a supply of detergent that it could meter out slowly. First, the resistivity of clean incoming water would have to be established. Second, the resistivity of water flowing over the dirty clothes. Third, as detergent is added to the agitating clothes the micelle action starts. Initially, before surfactant micelles attach to "dirt" the perceived concentration in the dirty wash water will be high. As more surfactant finds dirt the measured concentration will drop. Fourth, repeat slowly adding small amounts detergent until there is no change in resistivity of the wash water. This should be when detergent is no longer needed. It might be possible to do this in reverse for the rinse cycle to reduce rinse water used. Also: this should DEFINITELY be done with the water softeners that may not be needed at all where you live but detergent manufacturers add to all detergents.
You spin me right round, baby Right round like a record, baby Right round round round You spin me right round, baby Right round like a record, baby Right round round round #lol
I love scishow and all its field-focused sister channels. Schools should be playing these videos at least once a week. Casual Friday? Damn, maybe they already do that, I've been out for more than a decade. Anyways the wash is done. See ya!
I have been putting every load of laundry on a complete second cycle after the first has complete , without adding soap on the second load , for the sake of making sure that I removed as much of the soap that was left imbedded in the fabric for years now. I have been doing so since the use of liquid detergent was introduced in the early 2000's , because I was left under the impression that glycerin was added to this mix so that clothes would retain their fresh scent for longer. Being somewhat extra sensitive and prone to some allergies , I was also aware that some people developed skin conditions and rashes at that time. I figured I was better to ere on the side of caution and give my laundry a complete second cycle to make sure it was free of any soap once it was complete. For the sake of clarity , I still do put every load of laundry I do through a second cycle and check on that second cycle systematically just to witness the presence of soap bubbles and notice how much of it there is left. The first part of that second cycle is ALWAYS bubbly and the last part of that second cycle is usually clear of soap but the water still looks a bit murky at times. This method to manage my laundry also allows me to mix underwear , towels and kitchen cloths without worrying about cross contamination. I avoid using bright colors still , because those do leak dye on one another still most of the time , natural fabrics being the most prone to leak and absorb dyes. And I also try my best to separate laundry that is worn above the belt from laundry that is worn under the belt.
If your clothes are unstained (just BO, no dirt or oils), just throw them straight into the dryer with a perfumed dryer sheet. The heat evaporates the odors and the tumbling removes the skin flakes and hair.
I was expecting more about the machine itself than the way molecules interact but you did not disappoint. One thing worth noting, in the tests using the suspended fabric in the beaker of flowing liquid, I wonder why the mechanical agitation was omitted? Surely in a wash/rinse cycle, the agitation does more than move the water around the fabric. It also distorts and moves the threads, strands and even down to the fiber structure somewhat to help jiggle the grease/dirt until it falls out, especially if a surfactant can capture it. Of course below a certain threshold of movement, the grease will just cling to the fibers and the surfactant won't be able to undercut it, which is why thick grease/oil stains it. You have to get more rough with it lol.
I with no degree figured this out by myself years ago. in layman's terms of course but still that's exactly how I thought it worked what the hell have these "scientists" been doing this whole time?
Man, this video gave me some Magic School Bus nostalgia. As Molly Cule said in her hit song, you need WATER & Soap to lift the dirt away. Pretty sure that was 20 yrs ago haha
As a former Industrial Laundry pioneer. I can say that there are so many variables not being taken into account. An industrial Laundry washer (Tunnel) does not spin, it just turns from left to right and as it transfers it spins once in order to transfer the load into the following module. Quemical conscentration, temperature, mechanical friction among other things are needed to fully sanitize. The only thing holding back the laundry industry is the bleach, it just cant sanitize anything in less than 2 minutes and 40 seconds. Our Tunnels just cant transfer anything faster than that. Many Laundry leaders dont know this and dont even bother to do the proper research and completely ignore this, then they are wondering why they are getting astronomical amount of stain out of the production. Conclusion, there is more to laundry than just chemistry.
This has been bothering me for a while now... Every sentence said by Olivia always ends in a crackle in the last word... When you notice it, you can't unnotice it. After knowing this for a while now, I'm always a little bit irritated after watching an episode with Olivia in it. You're welcome.
Inventor: I just invented a machine to wash your clothes!
Friend: Awesome! How does it work?
Inventor: No f***ing clue m8
It does the spin thing similar to how we wash it ourselves
Probably me if I invent something. I just like to create something but I don't know how it work.
Minecraft Redstone is one of the example I just don't know how it work a month after I finish the project.
In the immortal words of Todd Howard: "It just works".
"Scientifically. It works scientifically."
*slides ritual candles, hooded robe, and athemae behind a nearby potted plant*
Probably more likely: Inventor: How does it work? Well, that's proprietary™ information© sir!® -wink-™®©
Her: "sodium lauryl sulfate"
People who have forgotten to bring their phones to the bathroom: "Hey, i've seen this one before!"
The backs of random bottles in my bathroom are where I do most of my intense reading.
This is so relatable
Underrated comment right here 😂
so THAT is why the name sounded familiar to me, huh
SLS is also in most toothpastes causing them to foam up, and it also binds with your sweet taste receptors on your tongue, blocking them from allowing you to taste for a short while, which is why orange juice tastes bad after brushing.
Scientist: "Hey, mom, I published a new peer-reviewed paper today. My colleagues and I finally figured out how washing machines work."
Mom: "Well, it's about time. You certainly never knew how one worked when you lived at home. Maybe you should study how vacuum cleaners work next."
@@Illiteratechimp I think joke is on men.
@@ExtremeMadnessX
;)
😂😂😂
@@Illiteratechimp Alexa!! Call the burn unit!!
Bro. Didn't Dyson physicist made made something ground breaking for vaccum cleaners?
The spinny does the wash make good cloth
Wesley223332 your profile picture is quite fitting
Big if true
Wesley223332
U very big smart
big brain
That's right Wesley! You are such a smart boy!
Life hack. Got a coffee stain? Wash it in coffee! It won’t get the stain out but will dye the rest of the clothing so you don’t notice the stain.
👍
Yeah this is big brain time.
Same with oil stains, just pop that sucker in a vat of canola 👍👍👍
So to get out a blood stain, I need to make a blood sacrifice? Sweet!?!
@@twistedH3L1X AZTECHNOLOGY WANTS TO KNOW YOUR LOCATION
Dang! "Scientists Just Figured Out How Washing Machines Eat Socks" would have been much better news...
You win the internet
They transform them into black matter.
Better would be: "...How to Keep Washing Machines From Eating Socks."
Creeper
I remember seeing a video on youtube demonstrating how dryers eat socks
The title initially sounded like an April fools joke.
Ya like jazz right?
@@Deathven1482 So your reply makes it look like you said, "Ya like jazz right?" 😂
It's Septembre
himanbam Right but the title sounds like an April fools joke.
Or an Onion video title
An awful lot of things are invented before we truly understand the theory.
It's engineers not scientists lol.
Scientist: How does it function? Can we learn from it?
Engineer: Does it work? Can I make it work better?
🤔🤔This says a lot about society
It’s not that hard to exploit a phenomenon. We still don’t fully understand how friction or airplanes wings work, but we use them all the time with great skill. All we need to know is what conditions cause the phenomenon, and then a lot of testing.
Most medications for example. We know that drug works, but we usually don't exactly understand how.
jackson kye engineering reaches limits that only science can overcome.
Scientist: explains the inner workings of the universe
Random person:so how does a washing machine work.
Scientist: ...
Me: I hope they cure my illness one day.
Scientists: We just figured out how washing machines work.
😂
So, that second rinse cycle isn't just for shits and dribbles.
If you've got shits and dribbles in your clothes, you probably got worse problems than your washing machine. . .
The second rinse removes the leftover chemicals and thats it.
Att a former Industrial Laundry professional.
It IS for shits and dribbles!
Or is it?
Finaly a sciShow that i can understand!
*watches the video*
next time i supose...
The major part of the video was revisiting high school chemistry, I suppose.
If you ever went to a school in your life, it shouldn’t be much difficult to understand
@@aaaadit5155 enko schools me ye science nahi samjhai jati, it's left for there undergrad and higher studies 😏😏 hamare pass upper hand hota hai enke common public se 😏😎
All I got was 🐟 0:56
Be nice
The fact that I enjoyed finding out how washing machines work really shows I'm slowly creeping towards middle age...
Sure. Slowly...
AND IM HERE, 17
You actually finally explained to me why a stuffed washer is not a good thing, leaving clothes feeling and smelling half-washed. Given that they don't have enough room for the clean water reaction you mentioned, it now makes perfect sense.
Exactly an overloaded machine also puts a lot of stress on the drum bearings
DIFFUSIO FORESIS!!!! Sounds like something from Harry Potter.
Your profile picture is so fitting
It’s the spell for cleaning your clothes in situ!
@@evilsharkey8954 apparently it's canon that wizards would poof away their excrement instead of going to the bathroom... laziness leads to creativity, I guess
How voldemort clean his clothe?
Sean Linsley, wait, so they could poof it away while it was still in the poop chute? That must feel super weird
See kids, tide pods are more than just a great snack.
Eminem kind of humor X)
@@iamnidal Eminem asked if the wanted to see him stick nine inch nails under his eyelids.
And also a great form of black market currency, if recent trends are any indication
I usually press "power" button
In Soviet Russia, power button press you!
Ryan K. Maybe, but in Serbia, we just threathen the power button with removal
@@euttdsiggh2783 In Scotland, they get kilt.
Poweerrrrrrrr
this is such an under rated comment
As a former laundry engineer I appreciate the explanations in this video. Much appreciated!
"The Surfactants" would be a good name for a band.
Would they cover "Talk Dirty to Me"?
@@TheRogueWolf
😂🤣😆
Sounds like a bunch of ants that want to act but can’t get any parts so they surf all the time lol
The surf act ants lol
There was a band many years ago known as The Detergents; their one "hit" was (cough) "Leader of the Laundromat"...
That's so funny. I double rinse my clothes sometimes because I think it makes them cleaner. I figured it got more of the detergent out.
Cardinal rule of washing: "The rinse is more important than the wash."
I've been practicing (and occasionally teaching) how to clean things: surfaces, clothes, kitchenware, and food. I'm totally unqualified, other than that I experienced a pesticide poisoning in 1980 and was taught some cleaning techniques to remove chemicals from my environment due to the resulting chemical sensitivity. This did however give me the impetus to further investigate cleaning methods. When I wash my clothes, I run them through an entire second wash; your video helps explain why my clothes end up so clean and with that fresh air smell!
At the end of this vid, you mention your big concern is that the clothes smell fresh. Let's investigate that for a moment:
What creates smell? Molecules in the air are breathed in and pass by the olfactory (smell) bulb deep in the nose. These molecules interact with chemicals in the bulb, resulting in stimulation of nerves--you get the idea. The key component of this is the idea of molecules in the air. In the case of clothes, where do these molecules come from? If there is anything on the clothes that can evaporate and subsequently trigger a smell perception, then this means there has to be something on the clothes for it to evaporate. Most laundry products, including detergents, softeners, anti-static sheets, and even some bleaches have fragrance added. Some so-called fragrance-free products even have what is called a "masking fragrance"; check the ingredients! If your washed clothes has that "fresh air smell," what you are smelling is a residue left on your clothes after the washing. In other words, your clothes are not actually fully cleaned! Properly cleaned clothes have no odor, with a few notable exceptions: natural cotton fibres will outgas (place molecules in the air from a surface) some of the residual oils inherent in the cotton plant; synthetics such as nylon and polyester may outgas some of the chemical residues left over from the manufacturing process. A sensitive nose may be able to smell these; they mostly have, especially in the case of cotton, a non-offensive odor, and for some, especially in the case of cotton, may actually be considered a pleasant "fresh air smell."
Carefully choosing laundry products with little or no fragrance is another step in ensuring that your clothes are properly cleaned and potentially have a true fresh air smell after their visit to the washing machine.
Thank you
50 years ago my mother taught me the rinse cycle was more important than the wash. Use a small amount of soap unless the clothes are greasy, then rinse with copious amounts of clear water; even rinse twice sometimes.
As someone who delivers and installs washing machines, I actually appreciate this video. Now if you can do one for ‘steam drying’ I could then explain it to our clients.
Yet they still can't figure out why my Deodorant makes the pits a rock solid mass from Hell after I wash them.
Your detergent of choice and deodorant chosen. Odds are the two act oddly chemically when mixed.
So, increase the rinse water's electric field strength AND faster rinsing speeds.
No
@@quantumsigmaqed6312 What do you mean "no"?
Meh...we don't wash our clothes with heavy water.
I figured that they would've known before they invented the machine..
Ryan Nguyen Then again, Ovens caused an ultraviolet Catastrophe
I bet we still don't know how electricity truly powers our machines. I mean, sure, you can describe what it does down to the subatomic level but how it does it? No chance!
It's possible to know, through testing, that something works without knowing how it work. Knowing *that* something works only requires data. Knowing *how* something work requires theory.
Engineering doesn't always wait for science.
Dominic H. What do you mean? That doesn’t make any sense. I mean, from a philosophical perspective, we could argue that we know absolutely nothing about the world, but from a scientific perspective it’s very clear how electricity works thanks to Maxwell and company.
Watching this in college doing laundry makes me forgive how long it takes
I don't blame em'... I also didn't know how it worked until i moved out of my parents basement.
Can't wait until they figure out the clothes iron! Let alone the crock pot...
LoL.
Simple jokes are usually the best.😁
Inventor : let's build a cloth washing machine
No body : how'd that wash clothes ?
Inventor: let's just build it, we'll figure that out any other day.
I love to watch my washing machine working and I actually read the ''ingredients'' of the products I use. This video was perfect, thanks! lol
It amazing that we are still learning things about things as mundane as laundry.
i love that the running explanation for years was "idk, it just works"
This episode just made me relive the time my first college boyfriend informed me that he had been doing all of his laundry for the past 2 years without any detergent at all because he "didn't realize he needed it". That honestly should have been more of a red flag than it was at the time...
I'm not sure what I found funnier, the fact that he wasn't using laundry soap for 2 years or that he didn't know he needed to. Its called laundry soap right? Its function seems obvious from its name ... unless he didn't know what the word soap means?
@@wolfiesara Great parenting too.
Me: I'm immune to clickbait
Also me:
You should not have revealed these secrets. Now plushie “friends” can figure out how to stay dirty forever.
I applied this new discovery to washing my car and found that rinsing it after i washed it makes it so much cleaner. I must be a genius. My mother would be so proud.
I love how she explains things. People that care about their content are the best. Much love girl youre my fav!!
i really enjoy these logical explanations. This is the most worthwhile use of the internet and RUclips.
Could you do a video on topics like this, that seem so fricken simple, and are so commonplace, but are unsolved? These kind of things are really unheard of before they get solved, I think it would be cool because someone watching your video could solve an unsolved problem they otherwise most likely would never know about.
More of a quality comment here - I haven't watched Sci Show in quite a while and the last video you actually presented. I went back to the old one and then watched this one since it was on the feed and the difference between them is astonishing. You seem way more comfortable presenting now than you used to. Tell the guys you want more screen time! Whatever you're doing is working!
*Everyone:* waits for new findings on chronic and terminal diseases, climate change, finding a habitable planet for the future of humanity etc
*Scientists:* We figured out how washing machines work
and I'll be f@#$ how far are you behind
Kyle Warburton ...what?
@@numnut1516 to the scientists working on the "study" on something everyone already knows yet cant seem to work on "important" issues like cancer, climate change, and etc etc
@@warburk Did you skip the part at the end of the video where she explains that being able to make more efficient washing machines would actually be a pretty big deal?
@@tekrunner987 do you not realize that they are about every 5 ish or so years
Wow i love this. This is like that paper that described coffee rings. Sometimes it’s in these seemingly ordinary everyday things that major discoveries and revaluations happen and can have wide ranging impact.
@3:10 Theword "Colloidal" is pronounced such that is sounds like "Collide- al". I believe that middle syllable is normally pronounced "oi" similar to void, droid and roid.
I loved the video though. Fascinating. Thank you for making it.
No
Wonderful video! Also Olivia, you’re glowing.
Was wondering who else noticed, second she popped up I instantly looked towards her belly to see if I could spot a bump.
Brenden Roughley I’ve got no clue but i just think she’s doing a good job. Im learning a lot and I appreciate the female voices in the science realm. Her energy is glowing. Her impact is important and appreciated. I wish her well.
Well now I’ll always press the extra rinse button on my washer
Machines don't even have that kind of mode
Modern machines don't even require it as the water is more than enough to rinse the laundry.
@@stephensnell5707 idk what you’re talking about because many washers let you select extra rinses.
TIL something I never knew that was quite interesting but will never need to know again. Thanks SciShow.
Yet another awesome video about something so mundane. Keep it up
This is actually a very important finding. Basically you can save up on detergent and water just by soaking clothes in a more saturated soap solution by using less water. Then just expending the energy and water usage for the rinse cycles.
"Scientists finally figured out how washing machine works...or do they?" **Cue VSauce music**
Exactly why I stopped watching that channel.
You're telling me it took until 2018 for a smart person to realize that rinsing clothes gets the soap out?
It's kind of like scientists figuring out how alcoholic spirits are really made.
Seriously have they?
So many modern washers only have cold water rinse.
..if it has hot water rinse...it would be better?
Why does drying on cloth line form lots of wrinkles; while cloth from dryers have much fewer wrinkles?
(Do people today even know what a “cloth line” is???)
I was listening to her with my eyes closed. It sounded like she has a lot of stress in her voice. It made me jump. I hope she is okay.
This is so fascinating! It's what I guessed when you began talking about it but it's really cool to hear about the details!
@3:10 can pronounciate diffusiophoresis but misdispronunciates colloidal
The title says 'Just Figured Out' and the 'rinse' reports are from 2018.
Kew Akl I’m glad I wasn’t the only one.....
Seriously! Her repeated mispronunciations gave me serious Forest Whitaker eye.
@@chaosisblond right? Aniotic? 😂
Aside from the clickbaity title, this video perfectly showcases how science works. Everyone can understand that washing machines are good at washing clothes, but the scientists here were trying to better understand the 'how' (and eventually the 'why') these things happen.
Most people would have no problem saying that they absolutely know how a washing machine washes, but not scientists. They work tirelessly on seemingly simple things to bring us to a conclusion of absolute certainty.
Now we all have the best working knowledge on how things are the way they are... or at least why washing machines work! Very informative
Scishow: Scientists just figured out how Washing Machines work
Today I Found Out: “Who first alerted the world to the ‘Danger of Dihydrogen Monoxide’”
have known for a long time that it was the rinse cycle that really got the clothes clean, but didn't fully "know" the reason WHY that was. cool vid.
0:30 ~
"Woman's friend"
Didn't fully process this for a short while, lol.
19th century sexism strikes again.
Two things: Washing machines in Germany can take up to 4 hours for regular cycles. I thought that was because they also need to heat up the water (usually no hot water intake) but I also had the feeling the clothes were cleaner coming out. Made sense, longer contact time of soap and water = cleaner clothes. Nice to hear a more scientific take on that.
Now here in the US, I always added the extra rinse cycle (when possible), but mainly because I thought it would help the soap to be removed more efficiently. Never thought it would be the actual part of the washing that takes out the dirt. You never stop learning!
That's ridiculous
40 Degrees washing is warm enough
Also that amount of time(4 hours) is just stupid
Also machines with cold water intakes only are 100% efficient and you won't find any modern machine that has a hot water inlet
Modern washing machines contain only a cold water intake
Well, I’m now at peace with the fact that these things actually do clean and not just spin my clothes in circles for 30 minutes
I didn't think I would be interested in laundry today. Thanks, Scishow!
Diffusiophoresis sounds like a magical spell from Harry Potter
I used to explain myself using the Entropy theory, high concentration - > low concentration molecular movement during the rinse phase.
Never knew this was not figured out.
Lol I was JUST thinking yesterday about how wonderful washing machines are, relative to the alternative.
Inventor: I have a washing machine, it will get your close clean.
Customer. Cool how do it work.
Inventor. I have no idea.
This seemed like a really odd post when I first saw it. Basically, I was trying to figure out how something could exist for a century or more, and nobody understood how it worked. After watching the video, I understand, but it still seems strange that nobody ever worked out the physics of it till now. Makes you wonder how many other things we use every day are also a mystery to science.
Scientist : invent the washing machine.
Also scientist (2019) : finally figured how it works.
Was probably an engineer who invented it, tbh.
Scientist: "What does it do and how does it do it?"
Engineer: "What does it do and how can I use it?"
Every 60 seconds a minutes passes in africa
Think of the clocks!
I bless this second that pass in Africa
My God that's awful!
How long will we allow this to continue!
Did you know that oxygen kills you?
Ethereal | 翰˜~ it literally does. I’m not joking,.
Wow! My grandmother, use a little soap. She cleaned rinsing the clothes was the most important part. Soup left Ian, she said yellowed your clothes. I remember her, and the ringer washer she used. When rinsing the clothes she would periodically take up fabric and suck on it. If she detected soap, it was rinsed again. Of course she had no idea how close she was to being right. She did not know the science. She also used a lemon juice to bleach clothes. Hang them all to dry. Once again, she worn too much would also turn your clothes yellow or brown.
True, if you replace “scientists” with “my dad.”
1989: We'll have flying cars in the future!
The future:
ScIeNTiSTS jUSt fIGuReD ouT hOw A WasHiNg MacHiNe WorKS
When they just called Washing Machines 'womans friend'
That was when men were all filthy beasts who didn't know how to wash anything.
It was better than beating the clothes on rocks.
@Reece A Do you have a better explanation for why it was called "Woman's Friend" other than the sexism rampant at the time?
John Collins by this point I don’t even know how to tell when statements are jokes or are serious.
John Collins I love dark humor, ngl, but that should have gone to r/comedycemetery, brother xd
Gotta lower down in that dark humor.
Now I know why I set my machine for extra rinse.
0:33 - "WOMANS FRIEND"
I wonder if this would work today...
Imagine washing clothes PRE washing machine
@@speedy01247 Did that for 2 years as there were no washing machines where I lived.
It's rough out here in the 3rd world.
Def not, I need it to say "Men's Friend" or I'm not buying.
Try it, film it and post the video here lol
Machine probably would work, "women's friend" not that much.
I work in an industrial clean room where we have to clean our product very precisely. Too little surfactant and the clean process has to be repeated (wasted time and resources), too much and it is possible to cause expensive damage to the product.
The concentration testing of surfactant in water is tested electrically by simple electrical resistivity.
And it occurs to me: a home washing machine could do the same thing automatically. It would have a supply of detergent that it could meter out slowly.
First, the resistivity of clean incoming water would have to be established.
Second, the resistivity of water flowing over the dirty clothes.
Third, as detergent is added to the agitating clothes the micelle action starts. Initially, before surfactant micelles attach to "dirt" the perceived concentration in the dirty wash water will be high. As more surfactant finds dirt the measured concentration will drop.
Fourth, repeat slowly adding small amounts detergent until there is no change in resistivity of the wash water. This should be when detergent is no longer needed.
It might be possible to do this in reverse for the rinse cycle to reduce rinse water used.
Also: this should DEFINITELY be done with the water softeners that may not be needed at all where you live but detergent manufacturers add to all detergents.
You spin me right round, baby
Right round like a record, baby
Right round round round
You spin me right round, baby
Right round like a record, baby
Right round round round
#lol
Lol.
True mvp
I love scishow and all its field-focused sister channels. Schools should be playing these videos at least once a week. Casual Friday? Damn, maybe they already do that, I've been out for more than a decade. Anyways the wash is done. See ya!
As for water usage, washing machines use a lot less household water than flushing toilets.
Depends.
Scishow: beware of clickbait
Scishow: WE JUST LEARNED HOW WASHING CLEANERS WORK!?!
I just had a conversation about this a few weeks ago. Creepy.
This is like the best SciShow episode ever.
Thank you SciShow for enlightening the world of science!
mmm washing machines delicious
That was far more interesting than I expected it to be.
This went from “honey how does this work” to “but let me tell you How you’re getting my skid marks out” way too fast
I have been putting every load of laundry on a complete second cycle after the first has complete , without adding soap on the second load , for the sake of making sure that I removed as much of the soap that was left imbedded in the fabric for years now. I have been doing so since the use of liquid detergent was introduced in the early 2000's , because I was left under the impression that glycerin was added to this mix so that clothes would retain their fresh scent for longer. Being somewhat extra sensitive and prone to some allergies , I was also aware that some people developed skin conditions and rashes at that time. I figured I was better to ere on the side of caution and give my laundry a complete second cycle to make sure it was free of any soap once it was complete.
For the sake of clarity , I still do put every load of laundry I do through a second cycle and check on that second cycle systematically just to witness the presence of soap bubbles and notice how much of it there is left. The first part of that second cycle is ALWAYS bubbly and the last part of that second cycle is usually clear of soap but the water still looks a bit murky at times.
This method to manage my laundry also allows me to mix underwear , towels and kitchen cloths without worrying about cross contamination. I avoid using bright colors still , because those do leak dye on one another still most of the time , natural fabrics being the most prone to leak and absorb dyes. And I also try my best to separate laundry that is worn above the belt from laundry that is worn under the belt.
Hold on, did you say "Sodium Yanny Sulphate"?
If your clothes are unstained (just BO, no dirt or oils), just throw them straight into the dryer with a perfumed dryer sheet. The heat evaporates the odors and the tumbling removes the skin flakes and hair.
But scientists are still puzzled by tumble dryers.
Here we call them “Sock-Eaters”!
I was expecting more about the machine itself than the way molecules interact but you did not disappoint.
One thing worth noting, in the tests using the suspended fabric in the beaker of flowing liquid, I wonder why the mechanical agitation was omitted? Surely in a wash/rinse cycle, the agitation does more than move the water around the fabric. It also distorts and moves the threads, strands and even down to the fiber structure somewhat to help jiggle the grease/dirt until it falls out, especially if a surfactant can capture it.
Of course below a certain threshold of movement, the grease will just cling to the fibers and the surfactant won't be able to undercut it, which is why thick grease/oil stains it. You have to get more rough with it lol.
I with no degree figured this out by myself years ago. in layman's terms of course but still that's exactly how I thought it worked what the hell have these "scientists" been doing this whole time?
This is the content I subscribed for.
I keep thinking she has a bogie hanging out of her nose. But then I realised it is a ring.
Same thing.
Man, this video gave me some Magic School Bus nostalgia.
As Molly Cule said in her hit song, you need WATER & Soap to lift the dirt away.
Pretty sure that was 20 yrs ago haha
I couldn't find any Soduim Yanny Sulfate in my detergent, weird
Underrated comment
As a former Industrial Laundry pioneer. I can say that there are so many variables not being taken into account.
An industrial Laundry washer (Tunnel) does not spin, it just turns from left to right and as it transfers it spins once in order to transfer the load into the following module. Quemical conscentration, temperature, mechanical friction among other things are needed to fully sanitize.
The only thing holding back the laundry industry is the bleach, it just cant sanitize anything in less than 2 minutes and 40 seconds. Our Tunnels just cant transfer anything faster than that. Many Laundry leaders dont know this and dont even bother to do the proper research and completely ignore this, then they are wondering why they are getting astronomical amount of stain out of the production.
Conclusion, there is more to laundry than just chemistry.
This has been bothering me for a while now...
Every sentence said by Olivia always ends in a crackle in the last word...
When you notice it, you can't unnotice it.
After knowing this for a while now, I'm always a little bit irritated after watching an episode with Olivia in it.
You're welcome.
Ig I hear it doesnt bother me tho. Kinda like an accent ig I just like it eh idk.
I got a washing mashine ad on this video
Are washing machines where dark matter comes from?
My God!
THAT's where all those missing socks go!
Except my socks. Probably due to how small they are. Have to run them 2X.