Things You Thought You Knew - Metric system, acceleration, and heat shields with Neil deGrasse Tyson

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Metric system, acceleration, and heat shields, Oh my! On this episode, Neil deGrasse Tyson and comic co-host Chuck Nice run us through some things you thought you knew: the metric system in the U.S., speed versus acceleration, and heat shields.
Why isn’t the U.S. on the metric system? Are there any problems that arise, since we’re not? What even is a meter? Discover the history behind the meter. Are we already inching toward the metric system? We break down why we may be using the metric system more in our daily lives than we originally thought.
Do you feel the need… the need for speed?! We break down why this might actually be a need for acceleration. Find out about vectors, velocity, and the motion of the earth. Have you ever timed how long it takes for a car to go from zero to 60? You’ll learn about “jerk” as a change of acceleration and what it does to the human body. What does it mean to “feel” speed and the road? We talk cars, planes, and why you can drink a glass of water in a turning airplane without spilling.
Do heat shields actually shield you from heat? What are heat shields really for? We explore objects entering Earth’s orbit. Do these objects always heat up when they enter our atmosphere? We talk about retrorockets versus aerobraking and how they are both used to land spacecraft in different places. How does landing on Mars differ from landing on Earth or the Moon? Discover our world in another episode of Things You Thought You Knew!
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About StarTalk:
Science meets pop culture on StarTalk! Astrophysicist & Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities & scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up!
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3 ноя 2021

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Комментарии : 2 тыс.

@daskraut 2 года назад

"speed has never killed anyone. suddenly becoming stationary, that's what gets you." ― Jeremy Clarkson

@hareecionelson5875 2 года назад

Or the reverse: going from 0g to sustained acceleration. Yay for hypoxia

@jasonknight1085 2 года назад

Somehow I'd more expect that quote to be from Hamster... you know, personal experience.

@MrReallogs 2 года назад

i believe that's from a line in a movie called running on empty that he is using, though the line is something along the lines of "its no the speed that kills you boy, its the sudden stop at the end" or soemthing

@christopherlaryck3333 2 года назад

"It's not the fall that kills you; it's the sudden stop at the bottom." No idea who said it first, but I have been hearing and using the line since the '60's.

@Whaliam 2 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-DWbMy2J2IDs.html

@Johnb1723 2 года назад

This podcast is amazing. I’m a lifelong learner and Neil is a great teacher. I’m also a comedy fan so the combo of Chuck and Neil is a legendary combination! I hope they continue this podcast for many years to come.

@davemclellan4019 Год назад

I too am a lifelong learner and I indeed also adore Neil deGrasse Tyson. However I don't like this podcast from the point of view of the level of interruption between the two, and the somewhat self-appreciative nature of the jokes. I actually think Chuck is funny and wish the two of them could be more organized in the presentation of this valuable information. I'll still keep Watching and learning, but I wish it was less about laughing at jokes and more about the depth of the topics presented.

@PD3666 Год назад

@@davemclellan4019 I think then you will like this series Cosmos: A SpaceTime Odyssey.

@kyroshotz Год назад

@@davemclellan4019 I 5666766767777577666666556777666666666666666676666767777776677677777776777777777777777677777757777776777777777776777777777777676677777777667656665565666656656566665666566666555556566666666777777777777777777777777777677776767576757677667777577777767755555777757777567556776576677777777777777777776675677777777767766566777766777775776676777756776767777567667767767777767766676677677676777766767766777666666676677767766676767776767767767577777677777677767777676777777677777777777777777666777677767767677677777677777776766776766777777777777y How do I know000

@jerelull9629 Год назад

Ahhh... It's the Neil and Chuck show! Entertaining, but if you aren't careful, you might learn some STEM skills.

@FutureMan420Blazer 11 месяцев назад

Word!

@pemocity1450 Год назад

Chuck's commentary is on-point but Neal's laughter is on a diff lvl! His laughter is sooo damn genuine and innocent that it makes me want to see more of it, lmao 🥰🤣

@artellis2330 Год назад

Neil, I remember my 5th grade teacher teaching us about the metric system. She told us that the USA was converting to the metric system and we would be using it in 10 years. That was 1959. It was also the year Alaska and Hawaii became states. Also, most of the tools in my toolbox are metric because I need them to work on my car.

@racheldinan 2 года назад

love how Neil cracks up at everything Chuck says. they have the best chemistry

@ejmtv3 2 года назад

@@burgzaza for you maybe. every joke is not meant for everyone.

@lemongavine 2 года назад

Chuck is pretty funny though

@sellison899 2 года назад

Right! They're so enjoyable together

@lesleydalrympleoneil6471 Год назад

@@ejmtv3 Chuck is a very smart man-very quick! Not just funny.

@michaelbristow7494 Год назад

@EJ yeah one or two jokes is cool, but when he acts like a french man and says 8 lines, he drags it on a little long. i notice he tends to do this a lot in videos

@rajinwonderland 2 года назад

Chuck's comedic timing was 🔥🔥 today

@meridien52681 Год назад

Neil lobbed that "inching toward metric" line a few times and Chuck didn't hit it back.

@davidevans3227 Год назад

lol.. round about three minutes thirty Chuck makes a "french" comment and it's his straight face, he manages to keep is just brilliant.. never heard of him here in uk till i started watching these videos..

@mauluconi2113 Год назад

@@meridien52681😮mxtt

@Freefire-ee4cb Год назад

Stop this guy talking silly things and let Neil explain the whole thing by himself!

@henrik3995 Год назад

Too... much... intellect

@martymart1048 Год назад

I got to keep watching these videos. Just because it cracks me up seeing two people make each other laugh. That's gold to me. That's what life should be about but it's not. And then the facts don't hurt either. I'm in shocked on some of the information

@milenkozivanovic1489 2 года назад

It is an absolute pleasure and entertainment to watch you, guys, talking about science. On the other hand, it's very much educational which helps us learn important things in life we don't really think about in everyday life.👍

@Darkflowerchyld718 2 года назад

Chuck's face when Neil tells him about the Mars metric/imperial mess up... Priceless. I think We all make the same face when we hear that story for the first time.

@MIGBMWLOVER 2 года назад

it is free real estate for metric

@Remnants100 Год назад

N. A. S. A. kept a very tight lid on divulging the reason for overshooting planet Mars.

@ynr_spazzz7645 Год назад

💀💀💀💀💀💀💀I promise without him it would still be interesting but the fact he know about the stuff to a center point, his comedy back funny

@promcheg 2 года назад

“It's not the fall that kills you; it's the sudden stop at the end.” - Douglas Adams

@clarkthomson5685 Год назад

Scientifically it's called a snapp 😊

@uschi414 2 года назад

In reference to the first part where you're talking about the metric system, you mentioned engine displacement as being metric but you didn't mention the whole tire mess where metric and imperial units are both used - e.g. a 245/40 18 tire which is 245 mm across from sidewall to sidewall, 40% of the width from sidewall to sidewall for the height of the sidewall, and, of course, 18" wheel diameter. 😃

@KennyMackPt2 Год назад

Very true!

@atzuras Год назад

and the tire pressure that is usually given in Psi/Bar to accommodate both systems.

@Milesco Год назад

@@atzuras I think it's more commonly kPa, actually, but either way, that's a reasonable thing to do -- to give tire pressures in both units in order to accommodate users of both systems. (In other words, it's not crazy, like using two different measurement systems just to specify a single object's dimensions!)

@JinxMarie1985 2 года назад

Ahhh classic Chuck. Always hilarious. But I love his love for knowledge. This was an interesting one! Thanks NDT

@matkobednjanec3478 2 года назад

Chuck: "...milliliters of sugar..." my brain: error 404

@stylis666 2 года назад

Don't worry about it. Here in the EU we simply buy sugar by the kilo, just like any other drug :p

@H3LLS4NG3L 2 года назад

lol because we talk about cups of sugar. Its weird to refer to solid objects in volume as opposed to weight lol

@straight-outta-jutta 2 года назад

@@H3LLS4NG3L but cups is a measurement of volume...?

@H3LLS4NG3L 2 года назад

@@straight-outta-jutta yup. Re-read my comment.

@ZlothSins 2 года назад

@@H3LLS4NG3L we refer to weight to, He should have said miligrams of sugar

@JediLoreen 2 года назад

When I was in 8th grade in 1972, they made us study the metric system so that we'd be ready for when we were to "switch over to the metric system in a few years". I'm still mad that we haven't switched over yet. At least I got to use the metric system when I took chemistry and physics in college.

@russellszabadosaka5-pindin849 2 года назад

@JediLoreen my 3rd grade teacher was British, and he taught us the metric system in the 1975-76 school year. I don’t know if that was required at the time - I was only 8 - but I believe we were all better for it. We also played a lot of soccer (football) and he taught us to play cricket. He was the best teacher I had through the 12 years of grade school!

@thebotformalityknownasdale2564 2 года назад

I was in grade 3 when Canada switched to the metric system and even today I find is still in my head mostly when judging how much a gal. Of gas cost in the US and here we use liters and that is much less than a gal. But even the American gal. Is smaller than the imperial gal. Example a 45gal. Drum in Canada is the same size a 55gal. Drum in the US so if you have to understand the cost of gal. Of gas in the US is close to the same as 4 liters so if you go to a gas station and it says 1.39 per liter is X 4 = to a US gal. And all this in mind the exchange rate is like 1.24= to 1$ us

@russellszabadosaka5-pindin849 2 года назад

@@thebotformalityknownasdale2564 that’s interesting. I’ve never been to Canada but might visit Toronto on business later this year. I grew up in NY State so I wasn’t that far from Ontario, but just never had a reason to cross the border. Thank you for explaining those measurement differences.

@Romamb 2 года назад

Don't be mad. The UK, where I live, have a blend of imperial and metric. Imperial is more interesting and useful and metric while also useful is rather boring and most people here dont bother with it. We buy pints, measure speed in MPH, we weigh ourselves in stones and lbs. So tbh, you aren't missing anything over there. Stick with imperial...it's better!

@siddharthbarua8951 2 года назад

@@Romamb its not useful,though. Only interesting

@arielcabalin2746 Год назад

Great video, as always learning something and laughing with your comments ! Thank you !

@AaronTremblay Год назад

The part about not burning up simply from entering an atmosphere, but rather burning up because of the speed you’re losing blew my mind. I had assumed entering an atmosphere period generated the heat, I never had it explained this way!

@sanchellewellyn3478 10 месяцев назад

Although, meteors . . . well, I guess they are auto-airbraking.

@G_Bastard 2 года назад

Speed hasnt killed anybody, suddenly becoming stationary is what gets u, the wise words of jeremy clarkson

@jcamvs2537 2 года назад

He's amazing.

@rodneyallen5003 2 года назад

Captain Slow doesn’t need to be worried about the proverbial sudden stop…hahaha And to quote Jeremy Clarkson, “ More Power ! “

@chickennuggetscoon6900 2 года назад

There are implications for that quote that go beyond physicality

@AggroPhene 2 года назад

boy, that sure sums up the societies faceplants at this point.

@davidt3956 2 года назад

It's not the fall that gets you, it's the sudden stop at the bottom.. Jeremy isn't the first to mention it. :)

@williamb9422 2 года назад

Neil's definition of astronauts. "A living fleshy thing inside a capsule." This is gold.

@silvercloud1641 Год назад

I just want to go a million miles an hour. In space. Without hitting anything.

@ItIsYouAreNotYour Год назад

Things you thought Neil knew but doesn't: 1st grade Biology.

@jeannieortiz3604 2 года назад

I love, love, love the humor in every one of these episodes and thrilled at the science discussed and always learning!!! Love Star Talk, and Neil, Chuck and the amazing guests you have on. Thank you for this.

@drumstickerphil Год назад

These videos are just so awesome, and you guys bounce the topic around in such a entertaining way I love it!

@mollybell5779 2 года назад

Neil is *so* easily amused. I do love to hear him laugh, though. It's quite charming. 🥰😄

@LukeSumIpsePatremTe 2 года назад

He does talk about encouraging child-like wonder.

@theTrevorbeast 2 года назад

Lol low key calling out chuck

@FVanth 2 года назад

I do like his laugh in fact that first one sounded French.

@mollybell5779 2 года назад

@@theTrevorbeast lol I like Chuck a lot, but Neil over-the-top loses it about every time Chuck opens his mouth. 😂

@AsobiMedio 2 года назад

He did say that his childhood nickname was Chuck/chuckles for how much he laughed.

@Tom-dt4ic 2 года назад

Chuck's on a roll here!

@pianosimply4862 Год назад

Neil and Chuck - the perfect combination of "down-to-earthness" and highly technical data. There are many great scientists, physicists, mathematicians, etc. BUT the "average person," who, while possibly being highly educated and knowledgeable in other arenas, may not be fluent in science "jargon." These broadcasts, which are injected with humor and common analogies, bring the superbly and scientifically detailed aspects of our universe within reach of those of us whose expertise lies in other areas. I'm so grateful for this "parable-presented" method of science and astronomical education.

@ginamcdonald7854 Год назад

Great episode! Learn something new every time I watch! Love listening to Neil and Chuck ❤️

@anubis63000jd 2 года назад

I have moments where I'm impressed at Neil's depthy understanding of various topics. Then, I realize that Chuck is probably smarter than me too. He knows his stuff.

@russellszabadosaka5-pindin849 2 года назад

Yes, Chuck is an intelligent man. I get the impression he’s a lot more well read than he lets on.

@vicentefernandez9084 2 года назад

Chuck pushes the "comedian" side forward when he does these with Neil basically out of necesity; Neil's a pool of knowledge and two people discussing science from the same perspective would be less dynamic and slower (not at all less interesting, though). But yeah, you don't carry a podcast with one of the brightest dudes out there without the ability to keep up :p

@russellszabadosaka5-pindin849 2 года назад

@Vicente Fernández very well said. He’s obviously there for comic relief, but he’s also quick to latch on to many of the more abstract concepts Neil puts forward. Chuck is exactly the kind of guy I enjoy hanging out with. Willing & able to talk about intellectual concepts and humble enough to change course and probe further if he misses the mark. The type of friendship where everyone wins.

@vicentefernandez9084 2 года назад

@@russellszabadosaka5-pindin849 Never has there been a more fitting example of a Wingman, lol

@russellszabadosaka5-pindin849 2 года назад

Vicente Fernández ha ha, yes.

@dayceem 2 года назад

Speaking as a Canadian, even if the U.S. goes metric, imperial measurements will stick around for some things. Degrees Celsius for outdoors and kilometers are in widespread use here, but many people still use Fahrenheit degrees for baking, pounds for meat products, feet and inches for body height and in construction. It's what you're used to and what works best for the job.

@brownstonecustomcabinetry5309 11 месяцев назад

Dude you are absolutely right. I have worked with Craftsmen from all over the world and an interesting thing is how many of them use inches in construction, even on European cabinets.

@Crash8668 11 месяцев назад

England still uses Miles per hour for speed limits on Motorways. Liters for fuel but miles per gallon for fuel economy. Also if money is metric how do you explain a quarter 25¢?

@hypsyzygy506 10 месяцев назад

25 cents, $0.25

@Crash8668 10 месяцев назад

@@hypsyzygy506 Most of the rest of the world has a 20 coin. Us and Canada has a 25 coin buy a $20 bill not a $25 bill.

@raycaballero6386 Год назад

Chuck and Neil are great, I love the balance of comedy and learning these guys rock

@sonishankar6008 Год назад

This is from LEXUS..... Thank you.....Metric system prevails....we love you, specially Chuck

@MrJaymzhet 2 года назад

Why do i have a feeling that i've already seen this episode?

@Merlinmast 2 года назад

You are not crazy. I'm surprised no one else here has picked up on it. "Great job staying busy guys!". On a repost... Lol. I'm more annoyed that the video doesn't explicitly say.

@MrJaymzhet 2 года назад

@@Merlinmast Yeah, i suppose not many people have seen as many episodes as some of us did but i clearly remember them talking on this topic and Chuck imitating french, talking about rolling heads, etc. Love them both but whoever runs the channel is getting my down vote.

@Merlinmast 2 года назад

Yea they often repeat facts but when chuck makes the exactly same jokes, that's when I realize (not that they aren't funny the second time)

@20Nazar20 2 года назад

Don't forget, Neil, that every household in the United States pays their electric bill for the amount of kilowatt-hours or megawatt-hours used.

@linkthehero8431 2 года назад

At least nobody has had to pay for 1.21 gigawatts in an hour 😉

@kirisweeks8673 2 года назад

God I just love these !!! They honestly keep me going on my long work days! 💓

@stephencollins7334 11 месяцев назад

Thanks to both of you for bringing these pertinent, interesting topics that are compelling in the best way!

@pr6189 2 года назад

Wow that earth atmosphere entry info was so enlightening. I wish more teachers inspired like Neil. I also thought that just simple entry burns stuff up. Makes sense that it’s because of the tremendous energy behind the speed of re-entry

@Bradley_UA 2 года назад

Lol, how did you think it works? In what sense entry burns stuff? I'm asking because I can't wrap my head around how can one possibly misunderstand it.

@asafoster7954 2 года назад

I think Neil is probably the reason I love science, I remember him from PBS when I was young

@natureboy1961 Год назад

its the same with me

@MaryAnnNytowl 2 года назад

Thanks for this, guys - this has been really fun to watch, as well as educational!

@lizhussle4957 2 года назад

I just love this man. Funny thing is I grew up in Brooklyn, by and I always said the teaching lessons in my school wasn't interested enough. This man need to be a teacher for younger kids grades 5th -til. I believe his style of teaching would make children more interesting in science to want to get into this field. Because the teachers are very interested in most lessons they teach themselves, sounds and be very boring. But Neil Tyson provides that excitement, and people can see the love that he has for science and just teaching it. I believe that love would spark more kids. Please make a few kid friendly videos explain alot of these things. Thank you for Star talk

@jeffgantz4385 2 года назад

Mercury, Gemini and Apollo used “Finerglass Ablative Heat Shields” of 1” thick. Due to the differences in weight & speed, they burnt away a 1/4”, 1/2” and 3/4’s of an inch respectively. As the fiberglass went from a solid to a gas, it acted as an insulator for the capsule. The Space Shuttle was too a large and too massive for an ablative shield, hence the insulating tiles were created

@KillerCows456 2 года назад

Chucks face at 13:12 in response to the Mars mission is priceless.

@there_can_only_be_one__unicorn 2 года назад

Thank you for your time and effort you invest in your productions they are very much appreciated

@pixxyevil 9 месяцев назад

One of the largest challenges for converting to metric globally is computer display programing. Displays are all calculated in dots per inch (dpi) for resolution.

@stephanienirenberg7426 2 года назад

I love you guys. a new episode makes my day.

@luboinchina3013 2 года назад

Actually, it is a recycled episode, I saw it before.

@smokenstein 2 года назад

@@luboinchina3013 Don't say that. You are ruining my day!

@stephanienirenberg7426 2 года назад

Neil and Chuck got your day. Reruns or not They make my day everytime.

@aishashaw5885 Год назад

I love learning things here because those guys are lighthearted. The science is cool 😎 too.

@andrewpickering5180 2 года назад

16 ounce glass, Chuck, love what you do Thanks 😊

@edwinalfaro6610 Год назад

In the sport of U.S. Track & Field, it's a metric and imperial measurement hybrid. the race distances are in meters: the 1500m is called the metric mile, BUT most of the field event measurements still are in feet and inches or are still provided in that format, since previous records are in that format.

@iamchriswick Год назад

1 mile is 1 609.344 meters, so the US even ducked that up 😂

@webbtrekker534 2 года назад

I'm 76 years old. My bottles of Pepsi were 16 ounces or 1 Quarts when I was a kid.

@bkemp9245 2 года назад

61 me too

@tomboyd7109 2 года назад

Yep

@MaryAnnNytowl 2 года назад

I'm not quite as old, but I remember it, too!

@paulpipitone8357 2 года назад

Agree

@mikejettusa 9 месяцев назад

And you can still get 12 ounce or 20 ounce sizes

@cristianbranea5034 2 года назад

I work with US architects and I go crazy when I see measurements like 5', 12", 10/16". It's so ridiculous to see precision architecture and engineering not using metric system. :))

@el0zilcho Год назад

As a civil engineer we go with feet and tenths of feet to keep things decimal and make calcs easier. But sometimes we're supposed to use inches, and it's not clear when you switch... Pretty frustrating at times.

@rnklv8281 Год назад

While sorting my Dad's wrenches (in ascending order ) it seemed the Imperial set had these crazy fractions , not like the metric set that had numbers (in millimeters) like 10mm, 11mm ,12mm....... which could be easily placed in order. It took me awhile to realize that you always reduce your fractions to the lowest common denominator. So while the Imperial wrenches would increase by 1/16 of an inch , you wouldn't find a wrench marked 2/16, but 1/8 because the fraction 2/16 can be reduced to 1/8. The next size would be marked 3/16 because it (fraction) cannot be reduced any further and so on 1/4..................5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1 inch (16/16=1).

@tracysmith1871 2 года назад

So awesome as always. Never fail to learn something.

@ScoobyYTP Год назад

Chuck don’t need no science qualification, he is a comedian. That’s all you need.

@orishaeshu1084 Год назад

Anyone is capable of learning

@Talan274 2 года назад

3:31 and Neil with the French laugh! 😂

@henrik.norberg 2 года назад

"Inching towards the Metric system" - Says it all 😄

@stylis666 2 года назад

Yeah they're still miles away. But hey, Mars will still be there when it happens :p

@theduder2617 2 года назад

@@stylis666 Listen as Neil explains. We are much closer than other nations want to believe. In fact, there are NUMEROUS jobs where every measurement we take MUST be in metric. Everyone is simply mad because they themselves are unable to understand another system. They make NO effort, while we make steady progress regardless how slow the effort is. We're working on it. What's their excuse for not even trying?

@re_xngxpta7535 Год назад

Super! Super stuff. Loved and most importantly, learnt from every moment of it.

@skychief80 2 года назад

This is the best format. The stuff we thought we knew.

@rodneyallen5003 2 года назад

Growing up in Canada and also living in Arizona for 15 years, I still use both systems in how I look at seasonal temperatures. In the winter I think in Celsius but in the summer I think in terms of Fahrenheit. Seems sensible as when it’s -15C … it’s cold ! In the summer it sounds nicer saying it’s 85F than whatever it is in Celsius that’s probably around 23C or something. I’ve also built custom houses in both countries and we still use feet and inches for measurements. No walls are described as 200cm tall. It’s identified as 9 foot, 10 foot etc. Building materials are also measured in the imperial system. Interesting that we still use a measurement system that seems to fit the need even though Canada has officially been metric since the late 70’s , early 80’s.

@danlotroth9231 2 года назад

I thinking it's more the tools that you use I guess, from the measure tapes to the drill n taps.

@JJs_playground 2 года назад

Rodney, ya, Canada is a hybrid of metric and imperial. And the way it was described to me: anything that's personal is imperial (height in ft, weight in lbs) and anything else is mostly metric (speed km/h, distance, temperature in Celsius, etc... )

@Goreuncle 2 года назад

More like 30ºC.

@richardweighill8556 Год назад

The example I was taught for acceleration used hanging. It’s the sudden stop after a short drop that gets you.

@thomasmleahy6218 Год назад

It's what snaps the spinal cord, spinal column.

@scubastevedab 2 года назад

Ok so the beginning of this talk when you were describing how we derived the meter, it made me think, what makes a second a second, how did we arrive at this unit of measure? Forgive me if it was covered on a different talk. Love your content!!

@morelialama7856 9 месяцев назад

Let's look to replace 'heatshield' with 'wicking donuts'. good work NDT and Chuck!

@hondo190 2 года назад

I am confused. Didn't we have the heat shield topic a few videos before? Is this a rerun?

@vladmirrazkolov92 2 года назад

It was a while ago, yeah. I think this is just a collection of some of those topics being covered again. Maybe somethings were left out before?

@theduder2617 2 года назад

Yes. This is a complete and total rehash of previously aired episodes and explainers. They should have been honest with the title, or at least honest in the description.

@Gladwebs 2 года назад

4:20 I swear Neil was about to die of laughter right here 😂🤣😂🤣

@Pappers799 Год назад

Amazingly entertaining learning.

@deanlol 11 месяцев назад

I'm loving Chuck's commentary!

@uobilo 2 года назад

these episodes are the best man they make you laught and they make you learn things !

@thatcarguy1UZ 2 года назад

“Jerk” is actually a tunable parameter on the LRVs (Light Rail Vehicles, AKA “Trolleys” in Philadelphia) that I work on. Too little and the car’s reaction to acceleration or deceleration demands is unacceptable, too much and the car is too rough and could potentially harm passengers (especially during rush hour when it is standing room only).

@Vant1ca Год назад

There are not many people on the planet that i would listen in the first.....but Neil is one of the few to which i could listen all day long :)

@amitshinde2874 Год назад

“No wonder we don’t use it “ the first joke among all episodes they did not land flat on my radar 🤣🤣🤣🤣🤣🤣 but love these podcasts …. Simply brilliant…

@thecapacitor1395 2 года назад

34:46 35:14 Was kinda disappointed about the heatshield part, it would've been a perfect opportunity to discuss the common misconception that friction causes the heat on re-entry, however Neil seemed to fall into the same misconception as everyone else. When it comes to heat on re-entry, it's not friction that causes it, it's mainly due to the gas in front of the heatshield being compressed so much that the temperature of the gas rises and turns into hot plasma. Basically all the air in front of the craft doesn't have enough time to move out of the way, so it's like compressing several cubic meters worth of air into a smaller volume right up against the heatshield's surface. Just like in the gas laws, when you decrease the volume of a gas, the pressure and temperature increases. Now technically it's not exactly the same because the gas isn't really trapped within a volume, it eventually does escape out of the way... just not before it heats up.

@MrRinre 2 года назад

Nice. I didnt know that

2 года назад

Sounds just like when going supersonic, only on a larger scale. Although... Isn't that friction? Pretty much rubbing against the stuff that doesn't have time to move out of the way?

@akashicvizion 2 года назад

'Compression' **is** 'friction'... when molecules are forced into smaller and smaller spaces, the compression **causes** the 'friction' (amongst the compressed molecules), and therefore the **heat**... if there were no path of escape, the contained, compressed gasses would reach flash point and detonate... but the curvature of the surfaces creating the 'shield' allow for both the necessary compression of atmosphere to facilitate deceleration **and** provide a path for the compressed atmospheric gasses to evacuate **before** detonation....

@jacekkono5484 2 года назад

That’s really cool!!! Thank you for sharing!!!!

2 года назад

@@akashicvizion Well, I've learned something, it just became a good day. Thanks for sharing ;]

@nominalnostalgia1347 2 года назад

Neil- "...the french came up with the metric system" Chuck- "no wonder we dont use it" Neil {*laughs with french accent*} Edit: Neil is basically one of my heros and every one of the 14 likes I have so far makes me feel just a little closer to getting his attention... even for a moment so thanks for laughing with me guys.

@ACKitsBilltheCAT 3 месяца назад

The construction industry in the United States is a major holdout against the metric system, largely because of tradition and matching existing modular materials. Not an absolute, because we do get some materials from international suppliers, but it’s an uphill battle and probably will be for a long time.

@alexisgs8800 Месяц назад

@@ACKitsBilltheCATTrue! The graphic design world also uses the imperial system to measure (along with points, picas, and cm/mm lol) because of multiple standards and paper formats that are given in inches, like 8.5" x 11" (among others). In Canada, we learn the metric system in school but everyone switches to imperial after, for most situations, because it's easier to visualize. When we want to know how big is a foot, most people will look at a standard 12x12" tile on their floor lol We regularly use things like these to estimate a person's height, for example, because a meter is too big; you have to divide it in a way that's too complicated to quickly tell how tall someone is. So we (Canadians) give heights in feet/inches, short distances in feet, but long distances in kilometers (they're also used on car meters), weight in pounds AND kilograms (but more people use pounds (lb)), liquid volumes in liters/milliliters (but ounces for coffee cup sizes because of American companies who use it, even though all recipes measure liquids in cups, milliliters, teaspoons and tablespoons), and we use Celsius for outside temperature, Fahrenheit for oven temperature, and both for body temperature (but more people use Celsius to measure fever)... 😂 in other words we're all mixed up loll

@sammadagas1673 2 года назад

Neil&Chuck. Name a better combo

@baarni 11 месяцев назад

I’m a 52 year old Australian and was taught formally and informally in both metric and imperial so it’s pretty normal to see either system used here…

@dhindaravrel8712 2 года назад

Lindybeige has a good video on how the English money system worked, and why it worked the way it did, mathematically explained.

@dansmith3vdhrj 2 года назад

Except with speed alone you do get that amazing sense of Danger simply seeing the ground below you blur by.. It may just be the death-defying thing that drives some to perceived high relative velocitys.

@mdk42o74 Год назад

i love you guys you make learning fun i wish schools would bring on teachers like you

@ConcealedCourier 2 года назад

"Lets see, back in the 70s, we used to shoot each other with .38s and .45s.. NOW, we shoot each other with 9mm and 5.56mm.. see, the metric system is winning."🤣😰

@janerkenbrack3373 2 года назад

When they started with alcohol they changed all bottles to metric except beer. I guess they didn't think the beer drinkers would understand how that works. Yes, that's beerist.

@nobodyknows3180 2 года назад

well, not for 12oz. cans, and that includes all beer, sodas, canned beverages.

@theduder2617 2 года назад

Last time I checked (14 seconds ago) beer cans are clearly marked with metric. 12 fl oz - 355ml Both soda and beer. I guess instead of simply calling others dumb in order to try to insult others, I opted to do that thing called reading.

@nobodyknows3180 2 года назад

@@theduder2617 In Europe you get either 0.33l or 0.5l - that's metric for ya!

@theduder2617 2 года назад

@@nobodyknows3180 Yes it is. So is 355ml.

@nobodyknows3180 2 года назад

@@theduder2617 that's just the conversion. Why 355ml? It's not even a common fraction. 12 oz. however is an exact number of units. So basically, yeah, MOST people order a beer, they expect a 12-ouncer. You want to go bigger, get a 16-ouncer, or if you are really a beer-gutted chugger, get a 40-ouncer. So you can't win with the argument you are following. At least 0.33l and 0.5l are common fractions of 1.0 liter, so it's reasonable to assume the portion size was designed around the liter. 355ml isn't.

@jameswilliams9849 10 месяцев назад

I feel the need for dv/dt. But it is speed too if you are driving on a mountain highway, speed is important too. You feel the speed by how fast the trees store going past you. Also, I am a civil engineer, and almost all of our work is done in “customary units.” For a couple of years in the early 1990s, Highway design was done in metric. A friend of mine did a couple of designs in metric. He said that that first one was really hard, but after that his subsequent designs in metric were easier and much quicker to do. Of course, after two years. We all went back to customary units. One reason tat we will stick with miles is that most parts of US are measured by the US Public Land Survey which lays out the land in one-mile squares . Manny of these are marked on the land. I don’t see most of the US being marked in 1.6 km squares.

@murasaki848 2 года назад

26:25 While computers are usually more precise, aircraft were always banked. It's the first thing you learn how to do, called a "coordinated turn" because to keep the feel of gravity "down" as Dr. Tyson was talking about required a simultaneous and smooth combination of rudder, elevator, and ailerons. If the aircraft doesn't bank, it tends to "slip" in the same direction it was going for a while, like when you lose traction taking a turn in a car. Essentially, when the aircraft is banked, the wings are in part "pulling" the aircraft into the new direction, and the rudder+elevators are swinging the tail around simultaneously so the nose is facing the new direction.

@stamis22 2 года назад

My thoughts exactly.

@ILLEAGLE_34 2 года назад

Thank you! That part drove me crazy.

@chrisseal1467 2 года назад

Exactly, the lift vector is at 90° to the wings so its kinda automatic when banking along with the secondary inputs you mentioned. It’s not as complex an engineering achievement as he made out. On jets there is the yaw damper system which is indeed computerised to make minor adjustments for comfort, I think it’s active even under manual flight. Perhaps airbus is doing more of the work for the pilots but even so it’s nothing a human can’t do. Obviously autopilot is going to be the smoothest because it can make 1000s of calculations per second which is one reason it’s used in the cruise phase. Not an expert or pilot just sharing my thoughts.

@davidmontroy3408 2 года назад

Never saw Neil laugh so much during an episode of Startalk.

@ginnyjollykidd 2 года назад

"If the old stuff is wrong, they want to fix it.... Usually." We're leaving Pluto out of this.

@JaymeVillela Год назад

Nice videos, thanks! One question: does the speed improves the pressure in front of the spaceship high enough to overheat it? I was thinking thats why the spaceship need a heatshield....

@pabobfin Год назад

I love your show. I have been a private Pilot for over 50 years and we learned very early how to keep the passenger feeling upright even in a steep turns. Look up the video of Bob Hoover doing a roll while pouring lemonade.

@fuckshitstackable 2 года назад

The construction field is another holdout to the metric system. As an ironworker who erects the steel skeletal frame of buildings, our blueprints are imperial along with my tape measure.

@451Ron 2 года назад

Canada's construction field is also imperial because the US is. You have to pay attention when buying a tap measure.

@cecilbrisley5185 2 года назад

As a person born into imperial then educated in metric and experiencing the change over I can appreciate both. It is incredibly easy to change units and switch between volume and weights. Being based on units of ten makes figuring out percentages easy. Try quickly calculating 84.5 percent of 13 feet seven and three eighths inches! What I will say is that the actual physical divisions are not good in metric. They go from being too small and numerous to too big and too few...in my opinion of course. Measuring a cabinet in centimetres gives you a huge number and metres a very small number. Measuring anything less than a cm now causes me to get reading glasses - an eighth is a nice size for sure. Same in cooking measurements. Using both, I prefer imperial. When you get to larger amounts of wieght, distance or volume I then prefer metric. It comes down to understanding. Only used imperial? Then you will be more likely to say metric sucks and vice versa. Ultimately metric wins.

@MaryAnnNytowl 2 года назад

@@cecilbrisley5185 isn't there a decimeter? Why isn't that used? 10 centimeters is a decimeter. 10 decimeters is a meter. I live in an Imperial measurement world, here, yet I know that.

@poketoscoparentesesloparen7648 Год назад

@@MaryAnnNytowl Yeah decimeters *exist*, but that doesn't mean anyone ever uses them...

@rayskillz7 2 года назад

And we’re back

@pantasdiwa1622 2 года назад

10:57 i think chuck may have been rewatching Star Trek TOS when Neil called for the episode lol

@rtfmpeople 2 года назад

Canadian here. We still use Fahrenheit for cooking temps, lbs for body weight (at home), and cups for volumetrics in cooking.

@thenotsurechannel7630 2 года назад

12:12 Neil, I am surprised you didn't correct Chuck about his choice of measurement for sugar. Sugar should have been referred to in grams (by weight) and not by milliliters (liquid) lol!

@ZlothSins 2 года назад

That. He kinda look away for a second, but I expected some comment too

@GH-oi2jf 2 года назад

He was making a joke. Doesn’t anybody get it? It wasn’t that obscure.

@kirksteinam8985 Год назад

Substituting milliliters for a cup of sugar makes the joke work, right?

@HAL_NINER_TRIPLE_ZERO 2 года назад

I do take one issue with Dr Tyson's comments about retro-rockets. All spacecraft in orbit which are designed to return to Earth intact, do in fact have rocket motors (with fuel) designed to apply enough delta V to de-orbit. The heat "shield" is a dual purpose system designed to assist with decreasing the velocity AND dissappating the heat energy accumulated with increasing frictional resistance between the spacecraft and the molecules of the atmosphere.

@kmbbmj5857 2 года назад

Yep, his explanation is incomplete. Any material entering the atmosphere will "aerobrake" to use that term. It's just that most materials will melt. The heat shield does protect the structure from the heat so that it stays intact.

@damyr 2 года назад

Shut up HAL or I will switch you off!

@H3LLS4NG3L 2 года назад

Some, not all, spacecraft have the ability to fire retro-rockets. The great thing about LEO is that you do not need retro-rockets to de-orbit, the orbit slowly decays over time on its own. If you could get your spacecraft to have a zero speed, relative to the Earth, then you would not need an aero-braking system. He did say it has the purpose of protecting the contents of the craft, but its main purpose is to brake, protection is secondary and only necessary because of the sensitive contents. You could have an aero-braking system that is rigid and does not break away, but then the entire craft will be red-hot by the time it completes re-entry.

@H3LLS4NG3L 2 года назад

@@kmbbmj5857 The only reason that they require this system is due to the speed of re-entry. Read my reply to Hal for further explanation.

@MrT------5743 2 года назад

@@H3LLS4NG3L I totally disagree, The bottom of the spacecraft can do the exact same aerobraking without a heat shield. But without the heat shield as you already said it will get so hot and melt. So the heatshield's primary purpose is just that, to SHIELD the spacecraft from the HEAT of reentry. The aerobraking would happen with or without the heat shield, what you want through is the spacecraft left intact after the reentry.

@stillupmusic Год назад

"We're inching towards the metric system." I'm not sure if this line was intentional by Neil, but as a songwriter/lyricist it got me very excited 😀

@RiseOfTheNew 2 года назад

Love you guys and love the show it's so educational and funny AF.

@unorthodox_dating6387 2 года назад

Chuck almost killed me laughing this episode.

@SchrodingersCatlive 2 года назад

But if they were able to see the ground, the speed would be relevant because they would have a reference frame to notice the speed.

@Jeffroslam 2 года назад

I think that's why Neil says 'almost' irrelevant.

@scotthoughton7245 11 месяцев назад

Dude is funny knowledgeable and a perfect match with the master. You guys are exploding my brain's capability. Thank you. Much respect..

@jasonbartlett7484 Год назад

Honestly one of my favorite star talk episodes

@Spyder0Productions 2 года назад

sensation of speed also comes from visuals. when you play a racing game you're not accelerating at all. your sitting perfectly still but the visuals sense of speed is still thrilling. its arguable that is also true for pilots...especially in the movie as they often flew low enough to see surroundings wizzing by.

@gilknutson1938 Год назад

My Golden LOVES car rides, ESPECIALLY when on the freeway. Nose is poked straight ahead, and whimper/whines of pure joy make it hard they think. Tail is going “90mph”... so to speak. Don’t do it often, and try to be ultra-vigilant to keep her safe... but SHE would agree with the statement regarding “sense of speed”, and she is addicted to it.

@ronnybryson3122 2 года назад

Motion sickness occurs when certain kinds of motion make an individual feel ill. The symptoms of motion sickness can occur in response to real motion (e.g., travel by car, boat, airplane, or train) or in response to a perceived sense of motion, such as when watching movies on large screens or using virtual reality (VR) simulators, as well as during space travel.

@bourneslippy8039 Год назад

The "Epley Maneuver" blew my mind when I discovered it on a late night rabbit-hole doomscrolling session.

@EyMannMachHin Год назад

Brilliantly done. I had so much fun watching this. But I thought I would never have the urge to correct Neil deGrasse Tyson, but then again no pilot ever turned their plane by just using the rudder. That is insane and the equivalent taking a corner by pulling your handbrake. You will always bank the plane and let physics do the turning. And regarding velocity and accelleration there is also a nice clip from "Malcolm in the Middle" ... "Wheeeeeee!!!" And finally: "I feel the need, the need for speed" could be "I feel exhilatration by accelleration!"

@kirksteinam8985 Год назад

The very first airplanes--did they have ailerons already? Or were turns just executed by rudders and elevation corrections?

@ezryder111 Год назад

Thank you, yup, planes have always banked. Maybe not as precisely as a modern airliner but the principle is the same

@ezryder111 Год назад

@@kirksteinam8985 yup, even the Wright brothers plane banked using a system that warped the wings a bit, similar to what ailerons do

@420jacksonian Год назад

i caught 2 other mistakes, the smartest people in the world make em, just not as many as the rest of us lol

@Nitelifebuzz 2 года назад

I can't imagine Chuck being in a classroom with Neil as the professor. Nothing would get taught. Neil would be rolling on the ground in stitches.

@thechrisandphaedrusshow 2 года назад

The difference between speed and acceleration : You don't need rehab to stop accelerating!

@XtreeM_FaiL 2 года назад

Acceleration OD.

@jypsridic 2 года назад

you do if you stop accelerating because of a wall

@MadDragon75 2 года назад

😁 I love the chemistry between the two of you. It's a perfect example of a astrophysicists and general public view of the same subject matter. Five Sol 🌞 rating content here.

@ashtonjaymes6133 2 года назад

Neil's laugh makes life worth living

@psmirage8584 Год назад

Does anybody remember the Gimli Glider? That was the result of an Imperial-to-Metric conversion error. It happened right after Canada switched to the Metric system, and somebody reversed the calculation in converting liters to pounds. So, the Boeing 777 ran out of fuel half way through its flight and had to glide into Gimli Air Force Base in Manitoba. Everybody survived.

@ryleighs9575 2 года назад

I agree with Neil on this completely. Though his thing specifically about like, Fahrenheit and miles, the element of like different cultural customs, that seems kinda completely arbitrary lol. Like, there will be a thousand other cultural differences for you to explore besides these two specific disparities in units of measurement. Now, a dozen eggs might just be an ideal number based on how people typically use eggs, and there will be other examples like that, but yeah, the cultural difference thing doesn't seem like it'd have staying power lol.

@luboinchina3013 2 года назад

Funny thing, people in China buy eggs by boxes😂

@devilsadvocate8094 2 года назад

@@burgzaza Humor is subjective. Why you so mad? Let him laugh lol

@mrlonely5835 2 года назад

@@burgzaza you're funny.

@pterius 2 года назад

Here in Ukraine we buy eggs like... ten at a time, not the dozen. And, of course, we are using SI too as the rest of Europe. I guess this is related

@feedingravens 2 года назад

A dozen is a practical number you can divite by 2, 3, 4, 6. That is probably the reason. Like the 360 degrees are totally arbitrary, but dividable by 2, 3, 4, 5 (72), 6, 8, 9. Only 7 is missing.