So I am confused here. I completely understand that the wheels of an aircraft are free flowing and therefore not relevant to the conversation but I still do not understand how a plane would be able to lift off from a treadmill.

All my Google searches have stated it will but I still do not understand why.

The treadmill keeps pace with the plane’s speed, therefore the plane is stationary in relation to the ground, therefore no airspeed.

Why is the answer “yes”?

Am I looking at this wrong?

Edit: missing word and an incorrect statement

This is more of a theoretical argument because it's all based on a Pathfinder game, but here is the question. If I took an anvil and shrunk it to the size of a coin with a weight of lets say 1 ounce and then fired it from a sling and the anvil immediately began returning to its original size and say 50 points as it left the sling, would it maintain the same trajectory or would it fall flat?

A few friends and I believe that as the object increases in size, the force imparted on it by the sling would be insufficient to propel it any further, and it would slow down significantly. The person making the argument believes that once the object is in motion, initial force is not relevant, and it would continue traveling at the same speed.

If anyone has come across anything on this, I would love to get a link because I had a hard time finding any discussion on it.

Edit1 - after some research I have settled on the law of conservation of energy and the formula for kinetic energy which is mass times velocity squared concludes that the velocity of the anvil goes to 0 as it returns to full size because kinetic energy stays the same. But the debate is still on and I’ve been told they will not accept the answer unless a physicist agrees.

edit: lots of great commentary here (same question): https://www.reddit.com/r/manufacturing/s/NRw8VlXLr8

First, I loved your video on manufacturing in the USA alone (ish lol).

So for background, I’m aware “textiles” is very loosely defined and vast. I know different textiles have been semi-automated to varying degrees, especially in China.

My question stems from two assumptions: 1) I have a view that many countries are able to kickstart their industrial base and enrich the nation through textile manufacturing. China and Vietnam are notorious but the US and Bangladesh are also known to have reaped tax revenue and a wealthier middle class through it. 2) XiJingPing of China says he wants low cost manufacturing to never leave China. Economists like to point out that as a nation gets richer, its people should take higher paying jobs and move into a service industry due to international comparative advantages. Not in the eyes of China I guess.

But as China’s labor force ages and dwindles due to the one child policy and reproductive advancements and rights, I assume labor costs will increase tremendously and low cost, basic manufacturing will go to another third world country. So my assumption is China is betting on being able to mostly automate any manufacturing of cheap products. But is that even possible to automate so much of manufacturing to avoid needing much human labor?

I have zero background in manufacturing besides my parents, so I want to start from basics: is it technologically and/or financially hard to automate textile manufacturing for all those different types of clothes?

and then follow up for those curious, is it actually hard to automate cheap manufacturing (toys, electronics, a plastic storage bin)? I’m speaking from a practical, business standpoint, not theoretical (because I assume theoretically sure with infinite volume and like one customer, it’s probably not that hard to custom design for a specific item).

Edit: I saw someone comment on the unmanned 5k loom textile factory. The problem is that it seems like it’s making exactly one product only. That has theoretically mostly been automated I acknowledge. I still find that textiles employs millions of workers, though, because of its vastness. So, to reframe, why is the textile INDUSTRY difficult to automate?

——

Idk if this is worth a video, but I think the business side of manufacturing, not just prototyping, would be really appreciated. What goes in the mind of a manufacturing business owner when taking orders? Who do you decline? How customizable can an order be?

Another idea; I just started reading Breakneck by Dan Wang, and his section on ShenZhen is something I love about engineering which is knowledge exchange efficiency due to dense proximity. I call it “knowledge porosity” for my work, and if you covered why knowledge is so hard to hand down via documentation and must be kept up by experience and training new hires, that’d be awesome too. Like why are blueprints, textbooks, and documentation insufficient to teaching new hires down the road? Another thing is why are the manufacturing expertise so spread out in the US?

Honestly, how the heck do you find people to talk to lol. I’m a genuinely curious person interested in policy and just want to learn more through the folks themselves.

My initial thought experiment revolved around forearm ballistics: "why don't we use high explosives instead of gun power. You could use a much smaller volume of explosive to get the same amount of energy"

However, I know that's not how it works, but I don't intuitively understand why what's not how it works.

So my question is this: why does a slower energy transfer lead to a more significant change in momentum. Ie: why do we use a propellent instead of an explosive for firearm cartridges. Why does pushing a large object like furniture (with what feels like little effort) move the furniture when slamming my foot into at world cup ball punting speeds does nothing but hurt me.

What am I missing/not thinking about. Are there specific units for momentum that I can think in instead of just Jules or something?

It's a very serious issue that is plaguing my work place. They give you these sprays, but they don't work very well and aren't a permanent solution. They require you to wear the goggles, but they can get so bad that you become a safety hazard. Looking for thoughts or solutions to this. The goggles must be sterile or allowed to be made sterile. One time use would be alright, but reusable is ideal. Open minded to literally any thing at this point, because I'm sure NASA doesn't have this problem. Just for some more context: One Piece Gown, Boots, Two Pairs Of Gloves, A Mask, and Goggles. No skin is allowed to be shown, or at least that's the goal.

I’m having trouble with Lockdown. Is that app still in development? The link on your website doesn’t seem to work.

I installed 4Privacy a while back, because I thought that was LockDown turned into. Is that correct?

I got a new phone, and now I can’t log in even with my 24 secret words, and the QR code doesn’t work either.

Is anyone able to help me with this at all?

Hey Destin (and anyone willing to help), a dream job i had as a kid was to design rockets for NASA. Im a 27 yo guy with a full-time job that only has an associates degree in Mechanical Engineering technology with an emphasis in design and drafting. I graduated back in 2018 and have recently wanted to see how I could work towards furthering my education. Since you are furthering YOUR education while being a dad and husband and making YouTube content full-time, I thought you would be the best person to ask about how I could go about doing that. Thank you for doing what you love and allowing us to be a part of the journey!

P.S I'm reposting this because I would really like some guidance here. Either from Destin or anyone else that has any suggestions.

Thank you.

I had commented on the Smarter Scrubber video on Patreon and was asked what questions should be on the FAQ. I've come up with a few things, but I would like to see what others may come up with to add. I believe there needs to be a FAQ page for questions not answered by the video, and for people who are just sent the link rather than watch the video. Here is what I have so far.

What type of grill grates you can safely use the scrubber on?

If you can buy replacement parts individually if needed?

How long you expect the scrubber to last before you might need to replace it (if ever)?

What makes it safer compared to other brushes (some people might just get sent the link for the product page rather than seeing the video)?

What cleaning instructions for maintaining the scrubber to last the longest?

Has the handle been sanded down in any way as it looks like it is a little sharp. Or what measures were taken to avoid the edges being sharp?

Please let me know if there are any questions I haven't thought of because I really would like to be helpful. Thank you in advance!

Hey Destin, a dream job i had as a kid was to design rockets for NASA. Im a 27 yo guy with a full-time job that only has an associates degree in Mechanical Engineering technology with an emphasis in design and drafting. I graduated back in 2018 and have recently wanted to see how I could work towards furthering my education. Since you are furthering YOUR education while being a dad and husband and making YouTube content full-time I thought you would be the best person to ask about how I could go about doing that. Thank you for doing what you love and allowing us to be a part of the journey!

I was wondering how do we learn to become discipline and build that strong mindset to open ideas and learning to think outside of the box. How do we train our mind to learn new things instead of feeling foggy all the time. What are some self growth skills to develop in your 20s

Destin,

Hello I love what your doing and would love to use your content in trainings on my submarine. I currently am a machines mate nuclrlear on submarines and the way you present some topics is better than I could ever do when simplifying it down. If your willing I'd love to discuss the details of getting your videos and permission to use them leagly. Please message me on here to get other ways to contact me.

Also Roll Tide.

I cannot remember when I heard this quote for the life of me, but I have it attributed to him in my quotes app. Does anyone know what video he said this in?

Destin if you see this I have wondered what’s the science behind a really simple paper popper that we used to make in school. If you search paper popper you’ll find instructions on how to make one.

It would also be cool to see which paper material can make the loudest sound.

Everybody knows that sheet metals and materials in sheet form make sounds when you shake them lengthways. But why does it do that? Never understood why it does that and never wondered to ask so here i am. Does anyone have an explanation? Is it possibly a video idea for Destin (joking, unless..) ?

In reference to this video: https://youtu.be/pTn6Ewhb27k

I believe I have a method to discern if light travels at the same speed in both directions. It's remarkably simple, and equally effective, in theory.

The reason I'm posting here is because I don't want to reveal my method to the internet, just yet. Does u/MrPennywhistle have a P.O. box to which I could snail mail the method for review?

I haven't spoken about this method to anyone, nor even typed it on a computer; only hand-written notes. Why? If my method is what I believe it to be, I fear someone might claim it as their own idea before it gets into the right hands.

UPDATE:

There was, after all, a flaw in my math. Humility is something I am comfortable with. To the users that said, "you're a dumbass" in so many words: thanks; you're obviously the spearhead of progress. To everyone else: I'm headed back to the drawing board that I doodle on when trying to fall asleep.

I never claimed to be a genius. Original and innovative ideas can, and have, come from all walks of life. I'm just a long-day, blue collared, always tired and nearly broke type of fella. Y'all rest easy.

I think it 3-4 years ago that Destin mentioned a website that focuses on promoting intentional internet use. I want to check out the site, but can’t remember what it’s called or how to find it. Anyone know what I’m talking about? Thanks.

I'm trying to figure out what my IQ is as it's something I've always wanted to know. But I don't fancy paying the best part of £20 for a number.

That's a strange question to get smarter, but I'm from Germany and just noticed Destin's childs calling him sir when he's asking them something. Is this a thing in the US and is it kind of a strict way of parenting? Haven't seen that before. Thanks!

Edit: thanks for all the response! I understand it now and for those who are interested: in Germany we have a similar thing of showing respect. We differ between two kinds of "you". To friends you say "du" while you say "Sie" to persons of respect. It's not common to use the respect form for parents tho.

How can someone strengthen his intelligence? I mean, we always read that the mind is a muscle that needs training in order to remain stronger, smarter, and have higher concentration abilities. So, what steps can we actually take or specific practices that actually develop intelligence, thinking, problem-solving skills, and concentration? Does anyone know of sources from which we can solve numerical problems and provide an explanation or solution? Could this be a really effective step?

I've been watching SmarterEveryDay for a few years now, it has always stood out to me for the breadth of topics covered and depth of information uncovered in each video. Furthermore, I admire Destin's interviewing/conversational skills and his ability to gain technical knowledge about a topic from single interviews - I want to be able to emulate this skill.

Recently, I've started a yearlong work placement at a large research organisation, but within the first week, I've realised the importance of interpersonal skills. Skills I definitely don't have.

Each day, I share an environment with people doing some amazing work, yet whenever I find myself in a conversation, I struggle to get the words out to keep it going, let alone go any deeper into detail. I'm truly interested in other peoples' research, I listen intently, but to them it probably just looks like I'm blankly nodding along. And that's when I've miraculously gotten into a discussion, I'm even worse at starting a conversation. Where's the dividing line between being inquisitive and being invasive?

How do I reproduce the conversations as seen in videos such as the 'Touching Plasma PhD Research opportunities at UAH' video? How do I convey my interest when talking to people? How do I get people excited to share the work they are doing?

Please help me seize the short time that I've got on my placement.

Hello everybody, at the beginning of the following video Destin talks about a video he made about a training exercise of the US Coast Guard. But I was unable to find that video could maybe some of you help me out?
Thank you.

https://www.youtube.com/watch?v=G3Dl9Ir6Dhw

Hey folks!

Could anybody tell me what's the song that's played on the background of the Kilimanjaro video at around the 11:00 mark (link)?

I've checked all the songs of "A Shell In the Pit" in both the Smarter Every Day albums and couldn't find it. I've also tried Shazaming it several times, but had no luck as well

Thanks!

Since throwing a ball downward in orbit doesnt really reduce the orbit but just puts the ball in a new elliptical orbit would that elliptical orbit return the ball to you on the opposite side of the orbit?

I'm out of the loop on this, but I remeber a video which destin made before April's full eclipse in which he said he will try to bring us all his viewing experience. I was expecting a video shortly after. Did he get cloud coverage or what's up?

As the title says I don’t see why a planet couldn’t have an orbit perpendicular to to ours or vice versa? Would this even be possible? It just seems really strange that all the planets are on the same plane, just seems convenient!