Can a drill inflate a balloon? (2 Truths & Trash)
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- čas přidán 22. 04. 2023
- Here are links to two of the products used in this video:
Anti-gravity Humidifier: amzn.to/3N6lfPL
Plastic Holographic Piece: amzn.to/40ygotZ
Just a heads up, the reviews for the humidifier are terrible, so I may have just gotten lucky with a good one.
Disclaimer: I make a small commission on all purchases made through affiliate links at no extra charge to the purchaser.
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2 Truths & Trash Playlist (All Episodes): • 2 Truths & Trash
Here’s a list of questions answered in today's video:
1. Does placing a battery with magnets into a copper coil cause the battery to move through the copper coil (via electromagnetism)?
2. Can you make a raisin lava lamp using raisins and sparkling water?
3. Can you fill up a balloon using a ball pump needle and a drill?
4. Can you balance a nearly empty can on its side?
5. Do strings of the same length (pinned from the same height) each carry half the weight of an object?
6. Can you use a small motor as a generator to light up an LED?
7. How does an anti-gravity Humidifier work?
8. Can a piece of plastic create a holographic image on a phone?
9. Can you make a fire with a gum wrapper and a AA battery?
Long-form - Věda a technologie
Curious, was the 2nd round too educational, or did yall find value in that?
it was nice
I liked it a lot! I also appreciate the introduction to the weird bullshit of E&M and especially magnets & circuits :)
As someone who's fluent in electrical engineering and physics, I think they're excellent sources of weird or fake examples
Super value
It was a bit too boring, along with the first battery one
I liked it, it's much better than just saying "oh it actually works like this" without further explanation. Showing us *why* it's not fake is a great educational tool and gives a lot more insight for people so that they can see why it's important to know.
I expected a normal truths and thrash video and i got a whole physics class
In physics we had to learn how to calculate the tension in a similar scenario, I studied it today again for the upcoming test, so I was so hapoy to know the answer
@@salmi2luccio same, though I was able to figure it out using just trig.
@@Coolgirl_ig_would u mind sharing the calculations?
@@skiney Basically for the weight to not move and the strings carrying the same weight. The vectors would have to be the same and the adjacent sides of angles a&b would be equal for the weight to no move. However, if we complete the right triangle, we’ll find that the adjacent sides are not the same. Meaning the weight should be moving, or, the vectors aren’t the same.
As for the explanation afterward. If we take the sin(60) and Devide the hight of the string. We get the length of the vector. If we do that on the other side as well using height of string/sin(30)We can compare how much longer the vector is compared to the other one.
I'm honstly happy about it XD
For the first time, I got them all right
1 mostly guess work
2 seemed pretty obvious
3 I saw the water trick at a science museum
Same for me, but I couldn't figure out how the drill one could possibly work.
I saw a video that has a couple otters playing with the water droplet thing. Quite adorable.
How was the first one guess work?
for (1) i knew that the drill couldnt possibly do that
I saw a guy do that in a toothpaste ad once
I was unreasonably excited for this upload. I loved the educational-ness of round 2, personally. When it comes down to it, if people don't want to see that part, they can just skip ahead like you suggested. :)
Got them all. You can loop the coil to make an "endless" train circuit for the battery. Also, steel wool works much better as a battery powered firelighter!
It ends when it gets jammed or the battery goes flat. Or it overheats the magnet to the point it loses magnetism.
@@rich1051414 Hence the air quotes, or to quote Homer Simpson: "In this house we obey the laws of thermodynamics!!!"
Fun trick I used to do in high school a couple minutes before the end of class was rest a quarter on top of a 9-volt battery so it would get crazy hot. Then once class let out, quickly flick the quarter onto the floor. Someone finds it, picks it up, burns their fingers lol
It was also fun to take shotshells and dump out the shot, then hot glue a marble or ball bearing to the primer or something. Toss a handful off the top of the bleachers, it sounded like someone opening fire with a machine gun.
Oh and gasoline from the groundskeeper's hut and styrofoam packing chips from the trash made napalm. Chemistry and physics was fun.
These are really interesting, wish i did it with live chat wouldve been kinda fun
Ohh yeah I premier might be cool
another way of seeing why the forces can’t be the same in round two is to take it to an extreme: if one of the strings is long enough to allow the other string to hang straight down, we know for sure that there can’t be any force on the first string.
and since it doesn’t suddenly jump to zero, we know there must be some kind of smooth transition between the actually balanced case of equal length strings and or extreme, so most likely it’s never the same in that range
I was personally confused at first because I thought they all were true until I realized I misheard and he had said UNequal length and wasn’t just to lazy to retie the string…
that's exactly how I thought
you stole my idea before I even had it!
Your videos are super informative and you clearly have a passion for science and it really shows in your work. Keep it up!
love the addition of the mechanics calculations. it’s been a few years and I liked the refresher
Thanks for putting in explanations! After some tricky ones in previous episodes I had no clue how they worked, so this was a nice addition. :)
Loved all 3. Got all 3 right somewhat because I knew a couple of the right ones before seeing this video.
Honestly, I was torn between A and B on the last one, but then I remembered that "perpetual motion" machine from before and realized this was almost certainly another example of some optical illusion lol
The strobe-light-on-water-drops-going-backwards phenomenon is also seen in some older movies looking at bicycle wheel or wagon wheel spokes, where on film it looks like the wheels are spinning backwards while the wagon is moving forwards. You also will see this sometimes in fans or helicopter blades, it's the same effect.
*For those curious as to why:*
Videos and film are also a series of still images ranging anywhere from 24 to 60 images per second (called frames per second or fps), and so this effect happens based on the relationship between how many frames per second there are and how much each blade, drop, or spoke travels in that same amount of time.
Let's say you have 3 fan blades (labeled A, B, and C) and are filming in 30 frames per second. If the speed of rotation is just right, then between frames blade B will rotate enough to be EXACTLY in the same spot that blade A was the frame before. When this happens, it looks like the blades are standing still. When the blades travel slightly faster, the blades look like they are moving forward, and when the blades travel slightly slower, they look like they are moving backward.
Same principle for the water drops
Cheers
On the one with the two strings and the weight, i believe how much weight each string is holding is dependent on the angle they are approaching at, not the length of the string like you said in the video.
You could have two strings coming in at the same angle but with very different lengths and they would still both support the same amount of weight.
I feel like he made that more apparent during the calculation part. The reason he talked about the length, though, is due to the initial set up. The premise was that two strings of different length that are suspended from the same height are holding the same amount of weight. For them to be suspended from the same height (and still have some tension), they would have to be at different angles. He pointed out that the length needs to be changed, but, as you point out, the suspension height could also be changed. As long as the end result is that the angles are the same, the support will be the same.
I loved the educational part. For me, it was a nice throwback to simpler times and I'm sure you got some people interested in physics with that
Love these vids and the small educational snippets you add to them 😊
i like how to live chat is fighting over which one is fake
Nice, nailed everything this time :) also liked the explanations
I really like this series a lot
C
The battery train thing I've seen before. Current going through the coil makes an electromagnet which interracts with the static magnets.
The raisin trick I've seen done with paperclips.
The balloon one though - A hollow tube being roated won't create an airflow or pressure through it.
Congrats on 1 mil.!
Decent understanding of physics and logic made this very easy and every single fake stuck out like a sore thumb. Cool video man
In physics we had to learn how to calculate the tension in a similar scenario, I studied it today again for the upcoming test
Thought that the last fake would be a rolling shutter but I still got it right that it was the fake :D
If you are going to do something like this again I think you should investigate the Bernoulli effect, and any experiment would do very well in exploring and learning about it. It is a very important concept that often can be shown incorrectly, though I think you would have an easy time engaging everyone with it!
No way I finally got to apply the knowledge I have gained from my statics course in uni onto a real life scenario!
On 4:19 it actually drops water but there’s a strobe light that is timed specifically to make it look like it’s going up(like a animation)
I just realized the weight is probably how most builders until relatively recent history used that to check if an object was level. By attaching a second string to the plumb-bob.
Perfect score! Liked the educational content
In the second one, it's easier to visualize why the tension is different if you just imagine that if the weight was directly under one of the strings, with the other string just attached to it, clearly all the weight would be on the one vertical string, so there must be a gradient of distribution based on the angle
I got the first two rounds right. The last one I thought the gum wrapper was fake. The flashing humidifier is genius!
I also thought the gum wrapper was fake- I've tried it before and it only got a little warm, but it was probably just that the battery was mostly dead or the wrapper wasn't torn thin enough.
I don't think theirs been a single time this season where the answer was d or e
Round one: B because I've seen a video of that before, and it's really a 50/50 chance for the other two
Round two: B because I've already seen both of the other things work in-person
Round three: A because I'm pretty sure those can only work by flashing lights rapidly
Round 1, the third one; you can also generate power by shining light at a LED.
Theoretically driving the motor.
What pisses me off is that I was sitting there watching the first set thinking “this drill one doesn’t look or feel right yet how could he fake this, there’s no way he routed an air pump through the drill” and then the answer is so deceptively simple and obvious, just reversed. Literally one of the most common if not single most common way to fake a video because it’s so easy, yet still gets the best of me sometimes
I actually think this style of video could be used as a really effective learning strategy. People are trying to spot the lie, so they’re really paying close attention to what you say while also engaging themselves to think about the logic behind it
I came to the comments just to appreciate the fact you threw in some teachable moments in round two.
I'm a civil engineer so the second one is a bit too in depth for me but that's because I took many classes that required it lol
I don't want to know; I've already decided that the raisins in soda is fake not because of science but because I refuse to believe someone deliberately decided to throw raisins into soda.
2:52 you explained this better then my dynamics proffessor ever did. maybe if he explained it like you did i might have passed the class
if you made the copper coil into a loop, would the battery infinitely accelerate or would it eventually stop accelerating? if it would stop, why?
Round 2-1 I used to do this all the time with my sodas.
2:07 learned that 20 some years ago when I was like 7 haha!
What if you wrap 1 long string around the dumbell, but they have different angles? Is it the same answer?
Very intresting! Although the 2nd round was quite the challenge but I manage to identfy the fake 😅
The third round was easy, though it confused me with option C as I couldn't quite understand it( I was really hoping you'll explain that more in depth😮).
Very fun video! Even better than your CZcams-Shorts verision 😊
He explained everything involved - The tinfoil on the outside of the wrapper is conductive The paper it's attached to will burn if you get it hot enough. The "skinny" section of the torn off piece has higher electrical resistance than the fatter parts at the ends. Because of the higher resistance, it acts exactly the same as an electric stove burner, eventually getting hot enough to ignite the paper the foil is attached to. Presto - flame.
I think it depends bro I found it super helpfull and interesting as I am currently studying this in high school
The issue with round 2 is that video B is just a test question and has nothing to do with being a video. The "trash" videos are most fun when the actual footage has been altered to present it in a more surprising light.
but i reckon you could do it if you had enough centrifugal force to pull the balloon walls out like a tyre when its spinning too fast but youd have to make sure it stayed in the centre with a rod or something
c. the short of the battery creates an opposing magnetic force thn the magnets on the battery. i have also seen the raisin thing happen irl.
I guessed that multiple were fake on the first one because, although the battery trick seemed plausible in theory, the film of it moving made me think for sure you were using fishing line to pull it through.
Same, plus I didn't realize the magnets were conductive so didn't see why there'd be a force to move the battery.
Taking a statics final Wednesday thanks for the refresher 😂
Nice. First time seeing your channel and got each one correct
Always love the two truths and a lie videos! What I want to know however, is how is it possible for the strings supporting the 5lb weight to be holding a total of 6.83lbs (according to the calculation segment, 2.5lb and 4.33lb)?
Because the strings aren't pulling straight up. They are partially pulling sideways, which means they are pulling against each other as well as the weight.
I got the second round correct because of the old mobile game Cut the Rope, whether that was actually related or just made me think of it.
2:13 I just so happened to have a partial can of soda on my nightstand that had just the right amount left in it to prove this as true.
Problem is, I've done most of the true ones. The only ones I haven't personally tried were the fake ones and the battery thing, but I've seen that one before. The strobing water droplets thing was also already covered by some big youtubers I'm pretty sure and the fake explanation just sounded weird. Still, cool video and I'd definitely like to see some more difficult ones.
4:40 Shouldn't the resistence be low enough to generate heat instead of high enough?
Since the voltage is constant we have V=i*R, i = V/R, Pot = V*i = V²/R.
Or did I get something wrong?
Heat in circuits are primarily produced via I²R losses. Current has the strongest effect. However, the circuit has only one path, so the current is the same through the entire line(aluminum foil). The cross section area of the line is inversely proportional to the resistance. So, the thinnest portion of the line has the highest resistance. Aluminum is more resistant at higher temperatures, and it causes a thermal runaway effect as the narrow region rapidly increases in resistance and heat. Once hot enough, the wax paper on the wrapper ignites, removing the structural integrity of the line, opening the circuit.
@@hadensnodgrass3472 But in this case the voltage is fixed and the current varies depending on the resistence connecting the terminals. So if the resistence is doubled, the current should be halfed. In the end the energy output is halfed.
@Pedro Nunes The voltage drop is highest at the highest resistance. While overall heat production does decrease as the resistance rises, the I²R losses become more and more concentrated. This local concentration of heat is accumulated faster than the lowering current. I hope this helps.
@@hadensnodgrass3472 I think I didn't understand yet, the battery and aluminium foil shouldn't make a simple tension source + resistor system? In this case wouldn't the formula Pot = V²/R (the voltage is constant regardless of the resistence) instead of the formula Pot = I²R (the current varies if the resistence varies)?
If you tape the balloon to the drills' vent holes, it would inflate. There's usually a fan on the back of the drills' motor to cool it during use.
THE PREMIRE WAS GREAT
i didn't realise this video was so new!
Wow that was great I'm surprised that I got all three I am an amateur lifelong learner and was almost perplexed by 2 of the problems but then just trusted my intuition of what I have learned over the years of self-study and got all three right
got all 3 right, for 1 i have done both the raisin thing and the magnet thing before, and the third one would make no sense, for 2 i knew that the weight was wrong because its pretty simple, and for 3 i have SEEN one of those in person so i knew it was an illusion
I JUST finished the schoolyear and my last physics unit was on electromagnetism lol, 6 months ago though I wouldn't have believed it
2:00 you also can see the direction switch is opposite of the direction the tool is spinning.
man i was so close on the third one i even guessed how A would have been faked correctly but then i thought about it too much and thought if the hologram was real i felt like it would be more popular given how it is such a fantastical concept and that ive never heard of it
Funny how you give a full explanation to the magnet but just act like the raisins don't need explanation at all
Can confirm the gum wrapper and battery, got bored doing homework one time and it made sparks and smoke
the cotton candy gun really helped for round 3
These have gotten a lot easier
I guessed BBA. But A in the first one is the magnet car troll science meme for real!
The fact I never got this in my recommendations is ridiculous
0:41 Nice reverse action
I’ve seen the water trick actually done. Like actually, not the illusion, with acoustic suspension, so I got that one wrong
3:00. Easier to understand, imagine one string being much shorter. You can then visualize simply by inspection, that the short string would hold almost no weight.
i knew the motor one was real mainly because thats how dynamic brakes on diesel locomotives work. the current generation from the traction motors creates friction which slows the train down
Finally, I got them all!
I really thought that gum wrapper one was fake
are these intentionaly easy to make people feel smart and enjoy the video? i enjoyed it
I knew the tricks involved in all 3 lol
A raisin lava lamp soda speak. Or sodas peek. Yea I’m keeping that in my head now.
Everyone run! He's trying to trick us into learning something.
Gotta love the prison lighter
Yup
Why are you commenting??? It haven’t even started yet💀
@@Ian-the-real-person cuz y not
@@PaleoRJ fair point🤷
@@Ian-the-real-person have a marvelous day good sir!
I hadn't been able to do it with a brushless drill but a brush drill you can do it and the balloon don't go in the front it goes over to vent holes
2:54 - 4:08 melted my brain completely and now I can drink my brain through a straw. Thank you :)
I care more about what kind of water mister/humidifier has a stream of water circulating, that's mildly interesting. Why? Seems like a great way to bring mildew spores into the tank.
Round 1 & 2 I had already got right on shorts, and for round 3 I believe A is fake, as it just has to due with frequency of droplets and framerate of light, and C is good to know
2/3
Got the third one wrong. Great vid
4:00 I LOOK AWAY FOR A MINUTE AND WHAT???
Nicee! I guessed them all! I was almost stuck between the hologram thingy and the weird humidifier thingy, but I guessed right :D
Yes! All 3 right
so the first one I knew beyond any shadow of a doubt it was real, but honestly I feel like the balloon one while I can't explain why feels more realistic because the air would have to come from somewhere on the raisins
OH there's an option for multiple are fake then the second two are fake while it's easier to conveniently ignore the balloon catching on the drill to pay attention to the air in the raisins, being allowed to choose multiple as fake makes this easy
OH SPARKLING WATER yeah that totally makes sense I'm retarded to miss that lol
That gum wrapper one is the general principle of a prison lighter as it’s by far the easiest way to get a fire going with the limited resources found in prison.
Thank god I just finished my trig unit
0:56 OMG call up FElon Musk you solved the hyperloop problem! lol
3rd round's first clip uses illusions.
I think that I made an ethanol fire during zoom class in 2020
these they likely need educating on basic science, and critical thinking. You could really help people by showing them how to think critically, spot scams, spot fake science and bad reporting. Go for it!
The real strategy if so figure out which one was faked and which ones were least likely to be faked ex a video being played in reverse or not enough explanation or proof like the weights
As an Electrical Engineering major. this was pretty easy
The last fake one (droplets going up), it is real but the given explanation was wrong, it is not a vacuum pump, but a strobe.
It is very nice effect anyway!