+Manchease Skrelpher Since the material is charged, opposite charges in the surrounding air are attracted to it. The charges in the air slowly neutralize the charge on the material. PS There's no Reply button under your comment because of your Google+ settings. - go to your Google+ page, - in the top, right corner click on your thumbnail icon, - in the popup that appears, click on "Settings". - for the 2nd question down "Who can comment on your public posts?" set it to "Anyone".
Thanks for this video. I found it to be very informative. It's good to see an explanation of this done at the molecular level and you explain in a way which is easy to understand.
Very clear explanations and simple and functional assemblies ... Infelizemente live in humidity environment between 50 and 90% ... To repeat these experiments only using air conditioner or dehumidifier air ... Great video ... !!!
claudiomar santos Thanks! I've had problems with very high humidity too, but I never looked at the humidity at those times. It was probably around 90% to 100%. In those times I used an air conditioner too and it helped.
Quick question: If one charges a material and then lets it sit so it eventually loses its charge, how does it do that? Do its molecules act as a "bucket brigade" for electrons to and from the ground?
FINALLY, a video on the triboelectric effect that actually EXPLAINS it! But there's one question this video doesn't answer. The balloon doesn't stick to the wall forever. I suppose that means the charges somehow equalize again. But how does this happen?
At a guess, the balloon moves around enough from air currents to break the bonds long enough for ions in the air to be attracted in and stick to the balloon and wall instead. As more of this happens, the overall hold on the wall weakens and the balloon slips down, allowing more bonds to be broken and ions from the air to replace them and so on. From my email notifications, you also asked where the air ions come from but I can't find where you asked it. There are a number of sources. Ions are constantly being attracted from the upper atmosphere where ionization occurred due to the affects of sunlight. Also, natural radiation at ground level causes some of it. There are others too but I don't recall what off-hand. I read up on it while researching for this video on powering a motor (weakly) using atmospheric electricity ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-2rVdEhyMR6A.html That was a follow-up to the actual experiment video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-qhXxSAv6rMg.html
Hey love all your videos and was wondering if you would be willing to look into the ebner effect and make a video on it? It is about putting plant seeds and or fish eggs into an electrostatic field somehow altering DNA
Why you get a shock when you touch a door handle or car door? It's all due to the triboelectric effect. This week's video explains it in detail. Enjoy! PS. Some of you may notice that this is a redo and much improved version of an older video, as I was short on time this week due to working on videos for a local company.
But why do 3 elections move from the glass to vinyl It's the electrochemical bond but why and how does that happen if both the glass and the vinyl are originally neutral molecules?
I'm no expert on the "how" at that level but from a quick read here en.wikipedia.org/wiki/Triboelectric_effect#Cause and here en.wikipedia.org/wiki/Electrochemical_potential shows that different molecules have different elecrtoschemical potentials and that determines which one gets the electron.
a question: if you brought a POSITIVELY charged item to a wall, it wouldn't stick, because the protons can't by themselves decouple from the electrons, right?
The item is positively charged because the atoms are missing some electrons, so it doesn't matter that the protons can't decouple from the nucleus of the atom. When it approaches the wall, electrons in the wall will be attracted to the surface of the wall by the positive charge of the item. That attraction will make the item stick, as long as it's lightweight enough.
When I got shocked many times in the dark before the electric sparks were clearly visible, it's very cool but quite a bit painful. Have you seen this effect in a dark room before?
Brandon Fisher It shouldn't make a difference if the room was dark or not. Maybe it's dark because of the time of day, and maybe it's dry in the room at that time of day. If it's dry then the charging done by your socks rubbing on the carpet will work better. I'd look for some other reason.
RimstarOrg It was some time in winter at night with all the lights turned out, I got shocked touching the DirecTV reciever in my room right after I took of my polyester jacket, I'm telling you I'm not making this stuff up; you could possibly see the spark in a dark room :-) Don't try this and expect for it to work because it doesn't always work 100% of the time
Brandon Fisher It was. I upgraded it to HD, vastly improved the audio and also added a bunch of new stuff. I was doing some video work for a local company, and so with less time available I took it as an opportunity to do a reupload/upgrade. The old one is still at ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Fph08eKTVZM.html for now if you want to compare. I hesitate to point that out though since you'll really notice how bad the audio is in my older videos :).
I use an anti-static wrist strap when working with sensitive electronics since an electrostatic spark from the body can damage the electronics en.wikipedia.org/wiki/Antistatic_device#Antistatic_wrist_strap
When you end up with one thing "negatively charged" and another thing "positively charged", I understand that they have those charges in relation to each other. But what happens if you make more of each? Is the relationship universal, or does it only pertain to its "sister" object? For example a battery's positive pole is only positive relative to it's own negative pole, and it doesn't share that relationship with any other battery.
gilbet Negative charge has to do with having more electrons than protons. And positive charge has to do with having more protons than electrons. The amount of each charge can be measured and then compared with the amount for any other charged object or portion of an object. So with full information you can compare the polarity and amount of charge with that of any other object or portion of an object.If you rub two balloons separately with you hair it's doubtful they'll both have the same amount of negative charge. In that case, strictly speaking you'd say one is more negative than the other, or one is less negative than the other. But I don't think it would be totally wrong to say that the one with less negative charge is positive with respect to the other. In some cases, when you don't know the quantity or the polarity of the charge, then that's all you can say.In the case of the triboelectric series, from experiments done in the past we do know which ones will become negatively charged and which positively charged.
RimstarOrg Thanks for your explanation. I've been trying to understand how a charge works, but electrons seem to be kind of hypothetical like moles that are used to make the behavior fit into equations and calculations. I wonder if any of your experiments have been able to establish concrete proof that they exist? If electrons to exist, then it seems to me if we were to "add" or "remove" electrons from an object, and keep the object inside a laboratory vacuum chamber, then it should be able to hold that charge nearly indefinitely. But if we have to say that the "charge" eventually dissipates because the surplus electrons "jump" across the gap, or "jump" across from the outside, then it would seem like electrons are just some type of magical pixie dust.
gilbet Oh, electrons do exist. An early experiment was en.wikipedia.org/wiki/Oil_drop_experiment but there've been all sorts of experiments since. Exactly what form they take is what's not known.
RimstarOrg I guess what you're saying is that electrons exist as a measurable behavior, but the process behind it is unknown. But It seems a little confusing for people to call it "electrons" as if it were tiny particles, when there is no evidence or even indication of that type of existence. If its just a behavior then shouldn't it be referred to as the behavior itself, such as "spin"?
gilbet They have more properties than spin, such as charge, and mass (using the physics definition of mass, not the intuitive one.) I'm just an amateur scientist but my understanding is that in quantum mechanics the notion of the electron being an infinitely small point source is a mathematical convenience. In string theory it's vibrating strings. Only some people think it's an actual tiny, hard particle, certainly not trained physicists. It's often drawn that way in diagrams for convenience. You have to draw something after all, and if the shape doesn't matter for the purpose of the diagram then you may as well draw a circle or sphere.
No, it gradually loses its charge and slides down and falls off the wall. Since opposite charges attract each other, positively charged ions from the air are attracted to the negative charges on the balloon and cancel them out. As more and more of this happens over time, the balloon becomes less and less negatively charged and so it is less and less attracted to the wall.
Around 02:30 in video, after being rubbed and separated, if the glass and vinyl molecules now have different numbers of electrons than before, is the glass still glass, and is the vinyl still vinyl? Or have you created a new substance?
Excellent question. Yes, the glass is still glass and the vinyl is still vinyl. The thing that makes an atom the particular atom that it is is the number of protons in the nucleus. The number of neutrons in the nucleus can vary, and so can the number of electrons. Though it's easier to change the number of electrons than the number of neutrons. Wikipedia's introduction for the atom is a good, and simple, summary en.wikipedia.org/wiki/Atom.
the king Balloon material is usually pretty thin, though you can find thicker stuff, but it should work. The white plumbing tape is teflon, so I'd think it would work. I don't know how practical it would be though, since it tears pretty easily. But speaking from a triboelectric standpoint, they should work together. You can use a glass tube from a fuse for the other roller like I do in my How to Make a Van de Graaff Part 2 video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-QrCgtjZwnB0.html
I have a question about the Triboelectric series table in regards to building a Van de Graaff generator. Is a positive material on one roller and a far away negative material on the other roller how it is done? How is the belt material determined? There are three materials involved, 2 rollers and one belt. I keep hearing people talk about using a top positive material with a low negative material, but not explaining how this relates to three parts. I'd appreciate any clarification you could provide. TallDudeInLA, using my wife's channel.
Yes, the surface of one roller is made of a material near the positive end of the triboelectric series and the other negative. Or it could be the other way around. The inner surface of the belt is made of a material which is somewhere between the two in the series. That's why rubber works well, it's near the middle of the table. That way, if the bottom roller is positive, for example, then the belt is more negative than the bottom roller, while the belt is more positive than the top roller. It's really the relationship of the belt to each roller which is important. That's where the triboelectric effect takes place. See my how a Van de Graaff generator works video for an animated explanation on that ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-EsZQS2GOMQE.html.
+Baskoro Lokahita I have no experience with electrostatic separators so I don't know what the requirements are. It may even differ based on what you're separating. You may need anything from a very low power Wimshust machine to a high power electronic power supply. Both are high voltage but the available current differs. So I really can't say.
i am suppose to rub glass on denim, cotton, polyester and tetrex then touch the wire but i am not getting a reaction and same process with the four cloths but with plastic straw this time to touch the wire still no reaction....electroscope made as shown
Make sure the area of the material that you rub is the part that you bring closest to the wire. Rubbing the materials doesn't charge all of the materials, just the areas where they rub together. Also, I mentioned this in the video, but it's an important factor in why it sometimes doesn't work, the air must not be too humid. When I use the glass, I first have to clean the glass with soap and hot water and then rinse off all the soap thoroughly otherwise it doesn't work for me either. The glass seems to be very finicky. A plastic soda bottle works very well when rubbed against clean hair (no hair products). But again, the areas that rub together are the areas that become charged. Hopefully something in all that helps.
tried but still no reaction when plastic or glass is rubbed then touched to the wire....so the scope may work or not depending on humidity? ...my country is a hot hot country would that be a factor why it doesn't work?
No, heat doesn't matter. Make sure you're not touching the wire with your fingers when you do it. That would prevent it from working. But you can hold the container that the electroscope is in. As I said, I found it hard to get glass to work since I had to clean it thoroughly. If something's plastic then it's also not guaranteed to work since there are things added to the plastic. It sounds like you just need to keep looking for different materials. It's possible there's a problem with the electroscope itself, but in all my years of helping people with this it's almost never, if ever at all, been the electroscope. Make sure the leafs can move easily and are made of a lightweight foil. Pieces of heavy metal or sheet metal for the leafs won't work. Also, the wire may have a coating on it where the leafs hang from it. Any coating there would prevent it from working. Scrape that area with a knife to remove any coating if you think there's something there.
I am recently trying to understand charging by rubbing. I first wrote down my theories on how it might work, because I wanted to check if I can guess it before actually trying to find out in the internet. Actually there aren't many videos deeply explaining it. However, it was one of my theories that bringing materials together may create a connection between them, like you said, making charges inbalance after separating objects. However, I thought my theory wasn't the best. Because if it worked like that, then why the rubbing is needed? Shouldn't it work just by putting objects together and then suddenly separating them? In your video there's no such question. Could you explain? My theory was that rubbing may create the bound easier, because materials like "get into' each other" - like when scratching, nail can get into the skin and make a wound. Is this the case?
Rubbing isn't needed. All you need it to make contact and then break contact. Rubbing is just a very fast way of doing it. For example, I show in my Van de Graaff video how the contact is made and broken by having a belt roll along a roller. See three minutes and thirteen seconds into the video here ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-EsZQS2GOMQE.html Wikipedia's page has a good description that goes into more detail than I do in the video en.wikipedia.org/wiki/Triboelectric_effect#Cause
@@RimstarOrg Thank you very much, as I went deeper into "triboelectric effect", I noticed that it explains all I wanted! However I don't quite understand one thing. I just made a quick electroscope and took a ruler. It kind of works (not like I wanted but it detects that something is charged), but when I try to put ruler inside my hair instead of rubbing it, it doesn't get charged at all. Do you have an idea why's that? Would I have to keep it for much longer inside my hair? Or just in this case the contact is too small and thus the rubbing is needed? Btw, I feel kind of stupid that I have NEVER heard of triboelectric effect. Like it seems to be a basis for all of this. They teached me at school about charging, I saw videos about charging and similar stuff, and nobody from these videos mentioned this effect (besides you of course, but I have 'discovered' you just today). I also love to dig into different science videos in the internet and I think I haven't came across this effect before. I also kind of ignored the question WHY it happens for my whole life, but today I changed it and you helped me, thanks :D #EDIT I am watching your videos now, and in this one: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-2PmWlPjV6n0.html in around 3:50 you say you can't just touch the vinyl, you need to rub it. Considering triboelectric effect, why is that? It's just an addition to my first question. Thanks in advance!
You need to make and break contact a lot in order to cause a lot of charge to be transferred. If you just put the ruler in your hair and take it out once then you've made contact with very little area. Rubbing is just a way of making and breaking contact with a lot of surface area in a short period of time.
@@RimstarOrg Got it, thank you! I have one more question - do you have an idea why my electroscope discharges when I put charged ruler near the "receiver" (coil)? I have made a similar electroscope, but when I bring my ruler, I can hear that electric sound and ruler gets kinda discharged. Is the air too wet? I am not sure what I've done wrong.
I'm not sure I understand your question. When you rub the plastic soda bottle against your hair, you hair becomes positively charged. You can even see it stand up when you bring the soda bottle near it again afterwards.
Yes, absolutely, provided the belt was made of a material far enough away from glass in the triboelectric series. The inside of the belt would become charged and the surface of the glass where the belt rubbed against it would also become charged. That's exactly what happens in a Van de Graaff generator with the two rollers. I talk about it in my video about how a Van de Graaff works here ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-EsZQS2GOMQE.html.
and just another question i have a glass jar and i put pvc dust or very small particules and shooke the jar with the dust inside would i produce ssome small static electricity? thank you in advance
Interesting. That should charge the PVC dust negatively and the inner surface of the jar positively. If the jar is full of PVC dust then both charges would be next to each other and the effect would be neutral overall. But if you let the dust settle to the bottom of the jar (unless it floats) then wherever there's no dust near the glass, the glass should appear to be charged from the outside (if it's charged enough). i.e. the outside of the jar isn't charged but the charge on the inside should be felt from the outside. Then again, the dust is negative and the glass is positive, and unlike charges attract, so if the dust is light enough, it might be attracted to the glass and the overall effect will be neutral. So while they're charged, you may not be able to detect it because they're next to each other. Like I said... interesting.
I recommend reading Ken Wheeler's, "Uncovering The Missing Secrets of Magnetism". The man has given the world a Unified field theory. The Standard Model is Astrology in comparison.
