Harvard Natural Sciences Lecture Demonstrations

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@noneofyoubusiness4895 11 сағат бұрын

Does the Golden Ratio come into this somewhere?

@3genac Күн бұрын

Does horizontal acceleration factor? How so?

@NatSciDemos Күн бұрын

Both objects have the same vertical component of their motion, which is independent of their horizontal motion.

@sirasalkanovic4039 4 күн бұрын

Tesla, if I remember correctly, even made a car run using this here, harvesting energy from these particles..

@rattansingh9157 10 күн бұрын

May you perform an experiment on Wave nature of Electromagnetic radiations. Please 🥺

@PranaykumarJha-br1zk 10 күн бұрын

From Arjuna 1.0 date 4.7.2024

@robertpitt8418 11 күн бұрын

Fascinating transformations for sure. I wonder if you used sea water as the bases and adding the compounds in the same order, how much would the solubility effects differ from fresh water. Just a passing thought. Thank you for sharing your work.

@jupa7166 11 күн бұрын

Very nice!

@fburton8 11 күн бұрын

How is that even possible?? It’s like magic!

@tamaseduard5145 12 күн бұрын

👍🙏

@dominicestebanrice7460 13 күн бұрын

Bizarre! The initial spring PE the system is "primed" with is the same (rubber band stretched equally in both cases) so.....I don't get it.....but then they indicated its not trivial.

@farhad_24 16 күн бұрын

Can you apply this setup for visualizing electrical breakdown in air?

@manojthomas9859 17 күн бұрын

I was checking for a coanda nozzle used in a milk spray dryer .Now I understand .Thanks for saving my time .

@frommarkham424 22 күн бұрын

how many volts is this inducing

@Heyok-vx7yf 24 күн бұрын

So if i pee on a lightbulb, the light will totally internally reflect all the way up my pee stream and illuminate the inside of my bladder?

@Dogecube 25 күн бұрын

Correct me if im wrong, but i was wondering why the pendulums line up exactly in that formation. What i think is because of the different string lengths, each weight moves a different distance, and because of that, they offset slightly to make those patterns

@puffinjuice 26 күн бұрын

Cool. I wish you explained more about the gel and the constituents of the gel. What are the properties of each chemical by themselves? Why do they gelatinize when they are mixed together? I feel like a lot of the interesting science was omitted from the video.

@ishanr8697 26 күн бұрын

Got canned heat in ma heels tonight baby!

@wernervanderstraten 26 күн бұрын

Nice one. Now how is calcium acetate made?

@SusanSchmidt-fr9ym 16 күн бұрын

I once made it when I was starting my teaching career by mixing excess Ca(OH)2 and vinegar. This produces water and Ca(C2H3O2)2 but you have to boil it down until it's dry. Time and energy intensive, and it wasn't very pure. Easier to just order it from a chemical company.

@VijayaBabu-jz1yp 27 күн бұрын

He just only do experiment he save my life

@exiledproductions956 27 күн бұрын

Would that sound different if the horn was in the back of the car? In a way I know it wouldn't but it seems like it would at the same time. So....???

@NatSciDemos 27 күн бұрын

It would sound the same.

@exiledproductions956 26 күн бұрын

@@NatSciDemos so the dopler effect is from the noise getting closer and further not where the sound is necessarily happening?

@exiledproductions956 27 күн бұрын

That is soo coll. I could watch that all day.

@prakramsharma9050 Ай бұрын

I also came after arvind sir class

@STUPIDHUMAN Ай бұрын

I feel like I'm watching the off day of a mad scientist villain when he's not busy trying to hold the world hostage.

@Joshuatree7746 Ай бұрын

Tumfrico's Period Experiment. Amazing!

@devrahul7435 Ай бұрын

Beautiful

@IgorL-rv1mn Ай бұрын

The girls at Harvard really love playing with those hub

@aufoslab Ай бұрын

it must be just aluminum burning in air, the friction heats up tiny aluminum particles to +1000C and it burns in air, there is no rust mix in aluminum with enough spread to call it thermite reaction. a scientist will try all possibilities before taking a conclusion, dissolve the rust with HCl and dry the ball to have same matt/rough surface without the iron oxide and repeat the experiment.

@ariannasv22 Ай бұрын

"More imaginative" thats a polite way of putting it lmao

@bl0ccr4fter24 Ай бұрын

I’m itching so bad to joke about them slapping balls together, but I’m going to resist it as best I can.

@AdricM Ай бұрын

sunsets with a lot of ash in the air are quite red.

@JennyWoo-uc5fy Ай бұрын

How can he just make a demostration video like a form of art

@That_Freedom_Guy Ай бұрын

So, rusty tools rattling around in a toolbox with some aluminium foil could ignite an oilly rag! Potentially. Thank you. ✌️

@memejeff Ай бұрын

Very cool idea. Really neat.

@JontheRippa Ай бұрын

Wow sehr interessant 😮👍👍👍

@MrMilsurps Ай бұрын

This video, without any words, helped me exactly understand blackbody radiation.

@gconol Ай бұрын

I just wanted to know if your mask protects you from radio waves........

@sakelaine2953 Ай бұрын

Rock banging based technology is the best

@rectify2003 Ай бұрын

Do it at a petrol station now

@wisdomoftheshadows Ай бұрын

I remember chinese fireworks like this. They called them dragon balls. Hit them together theyd spark.

@camojoe83 Ай бұрын

Yeah but they were covered in Armstrong mixture if I remember correctly.. at least it was easy to recreate them with Armstrong's and lacquer... I remember those from my childhood. They'd get worn out real good after a while and it would never fail that I'd pinch the hell out of a finger or something trying to slam the last pops out of em.

@wisdomoftheshadows Ай бұрын

@@camojoe83 They smelled nice.

@dornie_donko Ай бұрын

Melting skyscrapers

@baltakatei Ай бұрын

I love stories from Harvard Natural Selection High School.

@PMA65537 Ай бұрын

Too heavy to replace normal hiking ferro rod.

@hynekfuchs1378 Ай бұрын

👍👍👍

@steve-ey3rx Ай бұрын

I wouldn't trust the antisemites at Harvard about anything. They have NO credibility at all. This whole demo is probably fake to show how black metronomes have more rhythm than white ones.

@cHAOs9 Ай бұрын

I dont know if that's actually a thermite reaction. I think it's not. Steel balls hitting each other will heat and compress the air between them, creating a shockwave. It works with clean balls and paper too. In this case, it very well may be simply burning the molten base aluminum in the oxygen in the air, and blowing off a tiny bit of iron oxide. Considering the velocities of air, i would be very surprised if the two had a chance to react with each other. Frankly, it would look about the same since either way oxygen is bonding to molten aluminum. In fact, the air oxygen would be MORE energetic since it doesn't have to rip off of an iron. Prove me wrong. I'd love it if this was actually a thermite reaction. Blowing up thermite doesn't usually make the thermite react.

@camojoe83 Ай бұрын

Recreate this experiment over some clean butchers paper, then sweep the paper with a magnet when done. If you even get one microsphere of iron from it, then it thermited (it's a verb now, sorry)

@cHAOs9 Ай бұрын

@@camojoe83 True. With possible exception of Fe3O4 magnetic oxide that could result from heated Fe2O3. But that should be easy to see the difference. Good idea.

@camojoe83 Ай бұрын

@@cHAOs9 the other thing that might be happening here is an oxide detonation. If you watch Taofledermaus shoot those big aluminum blocks he has, there's almost always a good flash on the impact. Doesn't seem to matter what the slug is made of, either. So maybe the rust, the impact, and the foil being slightly oxidized (not sure that's possible? Maybe only on one side?) just makes a little blasting cap when you slam it all together.

@veronicanoordzee6440 Ай бұрын

DEMONSTRATIONS WITHOUT THEORY ARE PRETTY USELESS. MR WALTER LEWIN COMBINED THEM ;-)

@nileshw1368 Ай бұрын

Earth core to the iron ball be like : tum masst kaam kartaa hai, Anand bhaai ! 😊 Lava to the brick chunk be like : itney mey hi pighal gayaa, chhotey ?! 🤨 Kyaa sochaa thaa, sardaar khus hogaa, sabaasi deygaa ?! Al-Si !! 🤧

@WXUZT Ай бұрын

Remarkable ! Thank you for your time.

@scambroselauntrellus3681 Ай бұрын

"Where should we do the microscale thermite video?" "Let's do it in the gray experiment chamber" "Cool, should I wear gray?" "No, blue."

@russellpurdie Ай бұрын

That's why in Australian coalmines they don't use alluminium underground in general.

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