Here's the link to the full Episode 1 video with all 4 rounds: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-87OAEXcNssE.html Episode 2 will be out tomorrow! I will try to make an episode every other Monday.
Light sources can cast shadows though! The reason why fire doesn't isn't because it's luminous, it's because it's transparent gas (CO2 and O2)! Luminous opaque objects cast shadows, because when they would still block light from one side passing through to the other.
Look at burning flames with the use of monochromatic sodium lamp with the use of sodium chloride vapour placed near the burning candles But yes, the third one in normal circumstances doesn't produce shadows
@@thecomedypilot5894 placing the thumb on the other side of the straw implies that the person is about to stab something like it's the potato, how can you possibly not understand the joke?
@@frenchfriedbagel7035 bc the car traps the heat in a bigger area it's more focused out then putting it on one area like a blow dryer could be room temp yet it's hotter then room temp you get it
2 AND 1 are BOTH fake. Here’s why: Pressing your thumb on the end of the straw applies pressure around the whole circumference of the straw to increase it’s strength, not to increase the internal air pressure. Also, wrapping your fingers around it like that will also increase its tensile strength. He also penetrates the potato faster with his thumb over it, no chance of it going through if you hit it so slowly. Air pressure doesn’t build by just putting a lid (your thumb) on the end, and even if the the pressure did increase at all, then it would push against the straw going into the potato, buckling it. So the ‘air pressure’ theory that has somehow got around is just a myth. Pass it on 😉 Also: scraping a receipt DOES leave marks, you’re essentially disturbing the coating of the paper such as the dye and chemical matrix.
@@taweasmr air pressure would increase when approaching a second object. However it has to be right next to the potato by the end of the swing for the air pressure to rise. I cant explain this well so im just going to compare it to having a room with windows. If the window is open and you close the door, said door will slam because of the exit allowing for air pressure to remain the same. However, if you close that window and try to slam the door, in the past second it will slow rapidly because it doesnt have the ability to push the air it has into the pressurized room.
The funny thing is the receipt paper at my store was pressure sensitive not to the extent in the video but scratching the receipt paper with anything would leave a mark.
The amount of times we've had to sign receipts for other colleagues and a pen not working so we just try and get some kind of mark on there..... Taught me well I'd say 😂😂 definitely can't scratch a mark on those darned things or my job would be easier.
Even if I weren’t a cashier and knew how receipts worked, I would still have guessed 2 as it was the only one where you didn’t show the full setup. The receipt was already under the board when the clip started.
But i remember scratching a receipt that i got when my family ordered tacos at this place and it would become black or grey when i scratched it but also when i got receipt from other places that didnt happen
2. Receipts are heat sensitive, not pressure sensitive. You can make marks on them from the friction of your fingernail or other reliable generation of thermal exposure.
Alcohol will turn thermal receipt paper black. There is another kind of receipt paper, but its older. Its the duplicate style (canary color on back) that uses a dot matrix printer and the impact breaks the hidden ink. Also known as carbonless paper.
@@PHANTOM-kt3cd yeah because it's heat sensitive not pressure sensitive. So that makes sense but pressure sensitive would make it turn black every time it creased
Right? I work retail and almost believed it knowing they're heat sensitive and smacking something repeatedly generates heat but when he revealed it, it was game over.
@@jeremysmith9694Hes right though. I used to sit when I was bored at an old job and doodle on the receipt paper with my fingernail. Some receipt paper is just pressure.
Finally, someone else knows that they ARE pressure sensitive, but what you don’t know is that pretty much every single piece of receipt paper out there is going to be pressure sensitive as well. But why do I know? I’ve only worked retail for many many tiring years.
I knew the receipt one was wrong because I collected them to scratch them. It was the only paper I could stand my nails scraping against, and I never made any lines from my nails.
@@zoppletee5400 I wasn't being sarcastic. I had plenty of stupid accidents as a child. Such accidents are usually hilarious (apart from fatal ones of course). Children are geniuses at using the most inappropriate tool for a task and I was wondering what you'd been trying to do.
@@zacmumblethunder7466 oh, I thought it was a sarcastic grammar shot, which wouldn't have been wrong. I remember one time pressing a straw against my arm repeatedly and fast because I found the bending funny, I guess. (Kids find anything funny.) Accidentally put my thumb over the end and the straw didn't bend on contact and I remember a prickly pain. I was a relatively boring child
You can write on receipts like that. But they wont turn completely black from stomping on them 🤣I first noticed this at a McDonalds where the cashier circled my number on the receipt with her fingernail, and I was like, "WHAT KIND OF SORCERY...??"
I had the same experience at work when the cashiers needed to mark the receipt to indicate a promotion had been used and my jaw literally dropped. Couldn't believe I didn't know that could be done for so many years of my life 🤣
I used to think that flames ddnt have shadows because they produced their own light but VSauce proved otherwise when I saw a faint shadow of one on his channel
I had the thought “doesn’t pressure like that cause heat as well or am I confusing that with a different thing?” I found out by accident when I tried to return something…apparently I can no longer keep my receipts laying on top of the fridge. Lol I got my return with an explanation turned into a self deprecating joke but lesson learned. Heat sensitive.
@@Ruktiet What? That's literally an accurate explanation (that the receipt paper gets marked because of heat not pressure). In what way is it not an explanation "at all"??
@@turntsnaco824 because he didn’t mention that heat causes the marking. There is no chain of causality in this explanation because he missed to explain the last, essential link. For people who don’t know that heat is involved, it remains completely unclear why rubbing a receipt causes black marks. Also, you used the word “literally” in a completely erroneous way. You used it to put some sort of force behind your writing by completely misusing it.
@@Ruktiet Most people know that friction causes heat. If you've ever used a rubber eraser, you would know this fact. There might be people who have never used an eraser but they may know other things like starting a fire or the smell of burning rubber tires, both of which involve friction.
Somehow I knew this. Probably because I work in retail, so I know receipt paper uses a thermal printer. Same with my package shipping labels. No ink or toner ever needed. Just clean the printer with an alcohol wipe every once in awhile.
These videos aren't about gullibility. They test your knowledge on random information you may or may not have gathered over time. Gullible and ignorant are two different things. That said, I love these videos.
I think the gullibility is because the thumbnail features the potato one, hence if you were to see that one first you might have thought that one was fake. That was the test of gullibility.
Well you’re technically right but that’s cause more pressure equals more friction during fast movements. That’s why when you rub your nail across a receipt the harder you press down the darker the line will be
I get it but I wanted to say, if you heated up any paper would it turn black (because it's burning) I mean the high concentration of heat over a flame, paper will obviously burn the paper if held long enough over the flame, but say I have it just far enough away that the paper burns without actually catching fire would it turn black. Idk I'm not like an expert in this type of stuff. Also this has nothing to do with the video but is like a legitimate question. Can any piece of paper turn black? *under certain conditions* (without the use of writing utensils)
@@kennethmalloy3437 thermal paper is just different from normal paper. Like if you tried to laminate thermal paper it would just come out completely black. Its extremely sensitive to heat.
Except for fire. A flame will give off a lot of air and soot which results in the flame having a shadow when a stronger source of light than the fire itself is shined on it, A phones flashlight is barely not strong enough to cause this effect
@@excision3409 The flame isn’t the thing with the shadow, it’s the smoke around it from the burnt up particles. The flame itself will never create a shadow!
I knew the heat one because when I was a kid, I would use spare receipts to fold origami. All the rubbing created black lines and smudges, so I would rub out the whole paper. This was when i first learned about friction and heat!
Some receipts can in fact change color with pressure, but they're not common to use any more. The kind shown here however definitely doesn't. Also, the amount of pressure required is a lot. It would never be enough to whack and area that large with a shoe.
Me. Chicken patties. The precooked breaded ones. I microwave them, then pop them in the toaster to make them crispy. I'm eating mine, nice and crispy, before the average person's oven is even preheated for theirs, or their oil gets hot enough to deep fry.
@@_LizardKing_ Yes, that's what I'm saying. When you scratch the receipt, it makes a line of a colour similar to graphite, rather than the full black colour shown in the video.
@@_LizardKing_ the object which he was stepping on didn't seem as flat as uniform the black area of the receipt was either. It would have had darker and lighter lines if it was correct.
For anyone who doesnt know- receipt paper has an INSANE amount of BPA. Like 200x the *dangerous* level. You handle it daily. Your tupperware isnt the worst plastic plasticizer bad guy
My work is notorious for not having any writing utensils when you need them. Whenever we need to write something down, we scrape a paperclip across receipt paper. It’s basically a light pencil.
Thermal paper is in fact able to get marked up by pressure, but that was done with an iron or hair straightener to get that look. Source: worked at a place that had thermal paper and learned all the dumb things about it out of curiosity
If you do the straw trick with an aluminum straw and your raw thumb you can actually punch straight through any aluminum metal. You just have to do it hard enough. Any metal equal to or weaker than the straw material lets you punch straight through it.
And for good reason, thermal printers are cheap, compact, and repairs are easy, the only downside is the paper as it requires chemical treatment which in turn, jacks up the price.
I could be wrong, but I swore that some are pressure sensitive like this. Like they get smacked by the machine and it causes a chemical reaction that darkens it. I’m still finding it hard to believe that you can put a straw through a potato.
@@heelercs the printer head inside thermal printer heats up and strikes the paper, it may seem as the pressure is what does it but really it's the heated head.
Temperature and alcohol on the receipts. Happens at work in the pharmacy constantly when I just sanitized my hands and I see my fingerprints on the receipts
Working in retail made me immediately know lol. Thermal paper, as the name suggests, takes heat to create the marks on paper. Cheaper than having to replace an ink cartridge over...
@@cooq69 i mean, that is true, but you’d probably need a LOT of force. I tested it at work not too long before I commented that, and oh boy neither me nor my coworker could even get a single mark on it caused by the physical force. However, it was a fun way to pass time
@@HaroTulu When you stab a potato with a straw, the straw pushes into your thumb and makes a large circle in place where the hole of the straw originally was.
@@HaroTulu have you ever pressed a cylindrical object hard enough to leave a heavy indentation or puncture skin deep enough to draw blood? This is what FREDDY is referring to.
Knew it. Fire isn't matter, but light, so it casts no shadow. The logic for the straw and potato was explained. And most things change with heat, not pressure, which is why a lot of stuff changes color. Pressure is more apt to change shape.
Won’t work, cause the potato seals the other end of the straw causing it to become stronger. But that won’t happen on a fountain soda. Never tested just my guess.
