Neil deGrasse Tyson Explains the Difference Between Mass, Weight, and Density
Рет қаралды 222,371
Күн бұрынIf you’re trying to get in shape you need to lose weight, right? Neil deGrasse Tyson says wrong. On this StarTalk explainer, Neil and comic co-host Chuck Nice are breaking down the differences between mass, weight, and density.
To start, Neil tells us why when you want to get in shape, you need to lose mass. You’ll learn why a weight-loss book written by a physicist would just be one sentence. We explore the difference between mass and weight and why weight is all about forces.
Then, we move on to density. Find out why heavy cream is lighter than skim milk. We explore how the hull of a ship keeps the ship buoyant. All that, plus, Neil explains why, if you want to lose weight quickly, just head to the Moon and hop on a scale.
About the prints that flank Neil in this video:
"Black Swan” & "White Swan" limited edition serigraph prints by Coast Salish artist Jane Kwatleematt Marston. For more information about this artist and her work, visit Inuit Gallery of Vancouver inuit.com/.
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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!
#StarTalk #neildegrassetyson
0:00 - Introduction
1:07 - How To Lose Weight
1:38 - Mass
3:57 - Weight
5:01 - Density
7:47 - Neil’s Coffeeshop Dispute
9:02 - How To Float
11:15 - Units of Mass, Weight and Density
13:41 - Why Fat Floats
14:24 - Why Ice Floats
14:53 - Closing Notes
@alexkid1 3 жыл бұрын
One on momentum, angular momentum, torque etc would also be nice.
@kawaichanx3 3 жыл бұрын
*Nerd*
@mytech6779 3 жыл бұрын
Inertia, momentum, kinetic energy. And with angular momentum in both a stationary hub reference and with a moving hub(like rolling down the road)
@adamflynn7322 3 жыл бұрын
Motorcycle physics boi
@smirk6154 3 жыл бұрын
YES WE DEFINITELY NEED IT HIGHSCHOOL PHYSICS
@alexkid1 3 жыл бұрын
@@adamflynn7322 All of Newtonian physics.
@HecJ 3 жыл бұрын
At this point, Chuck is getting a free PhD just by being around Neil 😂
@ViratKohli-jj3wj 3 жыл бұрын
True lol
@thepropaganda1066 3 жыл бұрын
I think we all getting a little addicted
@DutchFurnace 3 жыл бұрын
The way some people got honorary titles, Chuck certainly deserves at least one of those.
@Peccath 3 жыл бұрын
PhD isn't about acquiring old knowledge but creating new.
@andrewolson5471 3 жыл бұрын
To be fair, Chuck is an intelligent man in his own right. What he may lack in formal education, he makes up for with a quick wit and an inquisitive mind. He always manages to come up with really smart questions. (I defined a smart question as one that doesn't have a simple answer, a question that can lead to an entire discussion.)
@talonit5150 3 жыл бұрын
"YOU JUST GOT SCIENCED" Neil Degrasse Tyson, 21st century, 2020 (human calendar) , Milky way, Planet Earth.
@PrinceKashyap. 3 жыл бұрын
You forgot to mention the Timeline!
@breakaleg10 3 жыл бұрын
It will show up on Google searches soon
@Rhekon 3 жыл бұрын
Sol System, Earth
@s.p.7313 3 жыл бұрын
Humans have more than 1 calendar
@papitata 3 жыл бұрын
12020, kurzgesagt calendar. My favorite so far.
@Metalhorse_ 3 жыл бұрын
I wish my Science teacher taught me like this, I wouldn't have taken Commerce and Accounts.
@jasonsands5881 3 жыл бұрын
I sooo identify with this
@obamavariant9128 3 жыл бұрын
That must have been a real interesting account class haha
@sharoonaftab8894 3 жыл бұрын
But accounting involves a lot of math right ? It's still interesting.
@ssmuikakarot6057 3 жыл бұрын
I didn’t grasp what they were until I graduated high school tbh. Density was the hardest but I understand it now.
@thequietknitter9107 3 жыл бұрын
I so get it! I was fascinated with science when I was a kid. But. . . oh wow. . . I had bad science teachers. . . except one. In fact, to this day, I still don't grasp the whole mass, weight, density, volume thing. I'll have to watch this a few times.
@EdwardHowton 3 жыл бұрын
Mass is an amount of stuff. Weight is the amount of force exerted by stuff under gravity. Density is the amount of stuff in a given amount of space. A bunch of feathers is a mass that weighs 5kg and takes up a huge amount of space because it isn't dense. A barbell is a mass that weighs 5kg and takes up a small amount of space because it's pretty dense. "Mass" is hard to quantify without gravity. If you have a six-sided die (d6) made out of _papier maché_ and another one made out of iridium, one will be much heavier, because it's much denser, meaning it has more mass in the same volume as the other one. A box of tissues and a gold brick have about the same volume, but you can pick up the tissues with your bare hands. With no gravity, you can pick up both, but the gold bar will still have more mass, and it will still have the same density. You can file that under Things Flat Earthers Refuse To Understand.
@Foretelling Жыл бұрын
Expertly explained, thank you sir
@davidmudry5622 Жыл бұрын
Weight is a resistance to acceleration. When the bus starts it accelerates forward and your weight goes backward...weight is not only from gravity, weight is only from acceleration.
@EdwardHowton Жыл бұрын
@@davidmudry5622 I was trying to come up with an explanation simple enough for even flat Earthers to understand, not that they believe gravity is real, so I went for less accuracy and more simplicity. But thank you for making up the difference with a better definition that explains why the gold bar would still be hard to move in zero gravity.
@davidmudry5622 Жыл бұрын
@@EdwardHowton Neil deGrasse Tyson teaches the Newtonian Free Body diagram where an arrow pointing down is gravity pushing down, and an arrow pointing up is the Normal force pushing up. Standing on a scale they say these two forces are EQUAL and opposite therefore you are not accelerating. But wouldn't the two forces cancel each other out if they're equal and opposite, and wouldn't you be weightless while standing on a scale? I don't like Newtonian physics. However, Einstein does agree in that if you are not being accelerated then you are weightless, but that happens when you are in free fall. kzfaq.info/get/bejne/jriiZM6SvbGmo4k.html
@EdwardHowton Жыл бұрын
@@davidmudry5622 Didn't take you long to go from zero to nutjob, huh. Veritasium still sucking up to a manbaby billionaire grifter these days? This is why we can't have nice things.
@kaloyankolev9804 3 жыл бұрын
Imagine entering a coffee shop and seeing Neil Degrasse Tyson outsmarting the waiter who lied to him haha. Tremendous.
@atlasfeynman1039 3 жыл бұрын
Plot Twist: The waiter put the whipped cream in first and it got diluted when he poured the coffee...
@aquadark2291 3 жыл бұрын
Just randomly about the ivory soap floating being a feature. It was likely a selling point when showers weren't a thing and you only had people taking baths. So if you let go of the soap you'd rather have it float and be easy to find than try and find a slippery thing at the bottom of some murky water.
@jasonlueker3032 3 жыл бұрын
Plus, air is free
@kingkiller1451 3 жыл бұрын
... Probably weren't benefitting much from the soap anyways if your bathwater is murky...
@walterhuegle8349 3 жыл бұрын
I heard it was a selling point in the 19th century when a lot of people bathed in creeks or lakes. If the soap sank you were out of luck.
@shandusa 3 жыл бұрын
The selling point was a lighter soap with less soap and tiny air bubbles Ja Ja
@aquadark2291 3 жыл бұрын
@@jasonlueker3032 What are you talking about? Solid bars of ivory soap float just fine.
@GlenHunt 3 жыл бұрын
Gotta say that these videos are more important to me during this time than you could ever know. Thank you for doing you!
@kaizerdestiny2947 3 жыл бұрын
This episode was very interesting. I knew these things, but was never able to explain it to others. Thanks for the lessons! I love you guys.
@Bryanhaproff 3 жыл бұрын
It's 4:20 and time for another Xplainer VIdeo! Never miss an episode. Thank you Chuck for all your hard work at making me Feel More Intelligent than I normally do.
@coffeeshangarworkshop8051 Жыл бұрын
I think Chuck gets an additional bonus in any gravitational situation because his humor is so uplifting. :-)
@originaldylanbaxter 3 жыл бұрын
Thanks for the mention fella's. We lumberjacks certainly appreciate the enormous physics/dynamics we unleash during production of our wood cylinders. Big fan! - Paul Bunyan Guy
@sbu1prince 3 жыл бұрын
These explainer videos are very useful. Dont stop making them. Thanks
@drottningu 3 жыл бұрын
With this episode you have me excited for some cool future explainers!!!
@garyb8373 3 жыл бұрын
Here in Ireland (in the UK too, I think), what you call "heavy cream" in the US is called "double cream". We have "single cream", "whipping cream", and "double cream", which all have differing amounts of fat.
@rd264 3 жыл бұрын
I gather the milk in Ireland is pasteurized and blended
@garyb8373 3 жыл бұрын
@@rd264pasteurised and homogenised, yes. Why?
@juliedattilo9298 3 жыл бұрын
Love this explanation, might have a few words in it ;-) that I might hesitate sharing with my 4th graders, but..... love the explanation! Neil is the only one who can explain about astronomy to this elementary science teacher and have her understand!
@ZeniferJenZ 3 жыл бұрын
They're still at it ✨
@surajchakma6713 3 жыл бұрын
Mug u give cvg u I is m
@goodolecubanboy3354 3 жыл бұрын
Always
@michaelcomisse9478 3 жыл бұрын
A little sanity in a crazy world
@ZeniferJenZ 3 жыл бұрын
@@michaelcomisse9478 True, but what about Chuck? 😏
@michaelcomisse9478 3 жыл бұрын
@@ZeniferJenZ hahaha I guess the difference is hes aware of his insanity and is doing it for a laugh. He's become surprisingly science literate though. I guess thats what happens when you hang out with Neil all the time
@garytucker8696 3 жыл бұрын
Love Star talk chat,thank you for sharing Gentlemen.
@pulkitmohta8964 3 жыл бұрын
The only explainer video where these guys talk about the topics of future explainer videos. They better make those videos soon
@mrlowie5728 3 жыл бұрын
Wow my eyes are open now I have been using these words for years and not really known the meaning thanks Dr Tyson
@Jay-om8gr 3 жыл бұрын
That’s my favorite ndt story. That was an excellent explanation of the scientific process
@FlareDarkStormGem 3 жыл бұрын
I have been told that the soap floating was a selling point because at the time people still took baths in lakes and if you dropped your soap it was very difficult to find, whereas if it floats you can see it float and get it very easily Idk how true that is but I remember being taught that
@mytech6779 3 жыл бұрын
That was the marketing push. Really they just were adding some air.
@ActionAlligator 3 жыл бұрын
@@mytech6779 Well, if that's the reason why the customers preferred Ivory soap, then the demand was real and not simply a marketing ploy to reduce costs. Or are you saying there was no actual demand for a floating soap? Did I misunderstand your reply? If so, sorry.
@kevinwalden4288 3 жыл бұрын
Love these explained videos
@theseeingkarp7958 3 жыл бұрын
We need some startalk merch! @StarTalk ! When are we getting new startalk merch guys? :)
@shottas184 3 жыл бұрын
This is one of my favorite stories every. Heard Neil talk about this in another youtube video(s)....and I was just taken aback and shocked. Employees at restaurants just get rushing to make your food.
@smydiehard99 3 жыл бұрын
chuck is one of the reason i watch startalk
@AJD... 3 жыл бұрын
Do an episode on buoyancy alone and the misconceptions. Would be awesome
@makemoneynow5061 3 жыл бұрын
Keep posting interesting contents like this!
@awilliams8778 3 жыл бұрын
Chuck makes these episodes great
@dizzydrc 3 жыл бұрын
Would love to see a explainer on ice expanding. Very interesting/ convenient that it's one of the few materials that expand while getting colder. Please let me know your knowledge about this. PS: awesome show/channel, keep it up!👍🏼👌🏽🥳
@DSzaks 3 жыл бұрын
I love the epiphany moment Chuck has about ice expanding at the end :)
@estherkirigo1055 3 жыл бұрын
I love StarTalk!
@ayanchoudhary044 3 жыл бұрын
That's best edutainment channel !
@danielfalin 3 жыл бұрын
there is very easy to understand way explaining this floating problem, in order for an object to float, it's weight must be less than the water it displaces. Great fan, love you guys!
@josephertz5786 3 жыл бұрын
Just wanted to say I love star talk. I miss Carl Sagan ( hope I spelled his name correctly ) . But want to also say that it's nice to see someone who does a great job in his absence. Keep looking to the stars and thank you so much.
@sherrryann 10 ай бұрын
thank you! this is helpful!
@shanehixson6706 3 жыл бұрын
Please do the ice expanding explainer!
@Edison-newworldBlogspot 3 жыл бұрын
Superbly explained... very animating ❤️
@kevinwalden4288 3 жыл бұрын
Do an ICE explainer please! Your explanation on JRE about water/ice was amazing 😁
@CB-kn1ox 3 жыл бұрын
Neil, you're just wonderful! Can't wait to hear about the ice expanding! Be safe. Be well! .....Canada
@coreymcconnell2329 3 жыл бұрын
We need you to keep talking about this mr. Tyson all your advice and your teacher skills we need it to keep going on and on and more more more more more more more from you lot of people need this mr. Tyson
@silvja8868 3 жыл бұрын
Sooo great! I am enjoying this so much! Thanks thanks thanks
@colinmeyer1307 3 жыл бұрын
Chuck is the best!
@stephanemujomba5148 3 жыл бұрын
Thanks for helping me with my physics class
@ravevx4947 3 жыл бұрын
Thats really really awesome video..it actually blowed my mind twice.
@mrgee9430 3 жыл бұрын
Would love a rant on the various right-hand and left hand rules in physics...
@elidames6889 3 жыл бұрын
Sat my 9yo down for this one, and she understood every bit of it. Pretty neat to see
@silvja8868 3 жыл бұрын
So great! I am also looking for „Ice expanding“
@user-kz8md3vt3b 3 жыл бұрын
You two are the best.
@shubhsrivastava4417 3 жыл бұрын
Neil and Chuck should do experiments in StarTalk Explainers👍👍
@Fsilvacanada Жыл бұрын
Always good!!! 🙂🙂🙂
@ayushmanghirmalani201 3 жыл бұрын
Dear Neil, I don't know if you will even read this but I am desperate hence I choose to comment here and try my luck. I wish to understand mathematics in it's true form. Ever since school we have been told to accept formulae and move on with it. I never really understood what is happening at the most basic level of any topic. I love the way you explain these concepts. I was hoping you could direct me to a source which can teach me all the concepts right from school level to university level in a way which helps me understand concepts at deeper level. Thank you in advance!
@theconfusedguy7639 9 ай бұрын
You both are amazing..
@skepticsapiens4149 3 жыл бұрын
best youtube channel.
@thiagarajang6813 3 жыл бұрын
Excellent
@erickmoiseshernandezbello6182 3 жыл бұрын
Yes star talk
@shonsweet2781 3 жыл бұрын
Chuck makes these interactions great! Love you both! At what point in a blackhole wounld you be a negative weight? Would you still have the same mass?
@dinamagdy6336 Жыл бұрын
very😊 nice learning
@kj.6010 3 жыл бұрын
I can watch these two all day
@christosbereris5483 3 жыл бұрын
Neil and Chuck! When I was in grade 9, I my science teacher stated that as gas compressed to liquid and then solid, it's volume diminished...but ice-water was an exception. I asked why it behaved differently and she simply answered: I don't know. It's been bothering me ever since, and I'm now 36 years old. Please please please don't forget to answer this question in either an explainer video or a cosmos queries. Thank you!
@JjVa20 3 жыл бұрын
Yes please, I want an Ice expanding video !!!!
@amyann3383 9 ай бұрын
Do an explainer on precision vs accuracy in physics.
@an3ssh 3 жыл бұрын
That whipped cream story is what i was waiting for. I had heard it from him long ago and after they started talking about heavy cream... i knew he was gonna bring up that story.
@blackbird163 2 жыл бұрын
This is so interesting 🤔 🥰🤗
@heliocentric1756 3 жыл бұрын
Please explain the physics of swimming sometime prof Neil.
@txsphere 3 жыл бұрын
I saw Chuck on the TV and immediate start looking for Neil. Then I realized it was a commercial. Can't remember what the product was,, but it was funny I wanted to see them both together.
@russellszabadosaka5-pindin849 3 жыл бұрын
This explains why, despite its size, Saturn’s gravity is comparable to Earth: an object’s mass determines the strength of its gravity. Saturn has a low mass because its density is *less* than that of water. If an ocean large enough to contain the totality of Saturn existed, Saturn would float on its surface.
@anthonyhamilton7778 3 жыл бұрын
I’m familiar with that BUT, I’ve been thinking... If there was an ocean that big it would have to be on an incredibly huge planet, with a density greater than water, which would make Saturn weigh a LOT more... I think Saturn would just “spill out” all over that planet like a gargantuan oil spill! I am thinking it would collapse under its own weight instead of maintaining itself as a sphere.. Maybe Saturn would merge with the planet and form one MEGA HUGE planet. Maybe even a star!!
@insane_troll 3 жыл бұрын
@@anthonyhamilton7778 Yes, and the denser core of Saturn would sink down into the ocean rather than Saturn holding together in one piece.
@keylimit7197 3 жыл бұрын
@@anthonyhamilton7778 so I’m guessing it would make a brown star
@mytech6779 3 жыл бұрын
No, just no, F. go back and watch the video again.
3 жыл бұрын
Neal explain the Eötvös effect. I think it is a interesting topic to talk about.
@commonsense99 3 жыл бұрын
Love it! Always a great show. This is much better than watching any politics learning something new.
@matthewblomstrom4190 3 жыл бұрын
Can we get video explaining displacement please
@yackohoopy 3 жыл бұрын
@StarTalk, if it’s winter on the Northern Hemisphere and summer in the Southern Hemisphere, what season is it at the equator?
@chriscubbernuss3288 3 жыл бұрын
"So, if Chuck weighs the same as a duck..." "He's made of wood." "And therefore...?"
@mstorrboy 3 жыл бұрын
I was quite disappointed when he missed that opportunity.
@mikeodgren 3 жыл бұрын
A witch!
@iamgroot4080 3 жыл бұрын
And therefore... He's a Wack? 😳
@duck3468 3 жыл бұрын
Are you making fun out of me
@TheEternalPheonix 3 жыл бұрын
@@duck3468 Yes, we are, what are you going to do about it?
@iamgroot4080 3 жыл бұрын
NOOO!!! MORE Chuck tomorrow 🥺💕
@kurisktan 3 жыл бұрын
I got another story to impress my Girl. ♡ Thanks Science!
@dukegavrilovic7001 2 жыл бұрын
I was going to show this to my class until the swearing started. Thanks a lot Chuck. It's hard enough to share brilliance with kids without the useless expletives.
@ompatel4760 3 жыл бұрын
They are the best that's it!.
@rakshitkumar8704 3 жыл бұрын
Have a question: difference between neutron star, pulsars and quasars?
@evocatus. 3 жыл бұрын
Well, a neutron star is small compared to other stars and it's also very dense. A pulsar is a rapidly rotating neutron star that emits radio waves and other stuff. Quasars are huge active black holes that emit lots of energy. This makes quasars very luminous!
@mavfan1 3 жыл бұрын
easily found with a simple search online.
@evocatus. 3 жыл бұрын
@@mavfan1 Yeah. I don't know why people ask a question that can easily have a solution found on the net.
@strayhart 3 жыл бұрын
@@evocatus. Formulating and writing down a question enhances learning. Social interaction probably also helps, in many cases. There can also be other dimensions to asking a question; other reasons why it might be meaningful to you. Furthermore, the discussion that might follow, might give new insights.
@sklt00n 3 жыл бұрын
You forgot the coolest thing in the universe "BLAZAR"
@littlechineseladyv2517 3 жыл бұрын
love you guys you always make my day. I'm 14 years old and would love to grow up to be like you(an astrophysicist) or a theoretical physicist.
@romanlee8287 3 жыл бұрын
Astrophysicist is the profession.
@littlechineseladyv2517 3 жыл бұрын
@@romanlee8287 thanks
@MarioDallaRiva 3 жыл бұрын
LOVE these weekly 'splainers! Thanks, gents. Hm, I've always been a "sinker" in the water....my wife's right about me being dense!!
@farhan_jiwani 3 жыл бұрын
Man, I love this
@yogesh-singh 3 жыл бұрын
Yes you should do a video on ice thing👍
@giovakoll 3 жыл бұрын
Quite the contrary: we love Chuck!!!
@amyann3383 3 ай бұрын
Neil you guys should do a precision vs accuracy explainer.
@jacobdancey145 3 жыл бұрын
This is perfect timing! I have a test on this on friday!🤣😂
@nHans 3 жыл бұрын
So how did you do on the test? Did the video help?
@jacobdancey145 3 жыл бұрын
I got a 100!😀😁😄😃
@mooneesamyavishen 3 жыл бұрын
Ice expanding! We need that❄️👍👍👍😂
@srinivasanseshadri9816 3 жыл бұрын
Humour helps comprehending heavy stuff
@davidevans3227 Жыл бұрын
the explainer about the equator sounds interesting has he done one?
@davidcanmore8257 3 жыл бұрын
Really love NDT! Learn something new every day and enjoy learning it and left wanting to learn more. Have to have my daily fix of education now. Truly is an educator. Takes the “boring lecture” out of science. Oh and Chuck is ok too I suppose 😂😜
@swedeson6188 3 жыл бұрын
@StarTalk I have a question, The faster you travel, the slower the time (compared to one moving slower), how big is the difference between for example Sweden and the equator under one year??
@vuyojansen1350 3 жыл бұрын
My happy place ❤️
@jackdaniels2905 3 жыл бұрын
Gosh dang, I think I finally get the difference weight vs mass.
@racheller8753 3 жыл бұрын
I love chuck!!
@DanielCastillo911 3 жыл бұрын
Hey i want to see an explainer of ice on water and why there is less sun in the ecuator!
@darthdookuvader163 3 жыл бұрын
Could you guys explain centrifugal force vs centripetal force?
@adrianoravina9044 3 жыл бұрын
more chuck tomorrow!
@kutispwet6441 3 жыл бұрын
where were you during my high school Physics class?
@lilnastyy1604 3 жыл бұрын
Never knew I needed a soap that floats... now I want it
@shriharshdeshpande9290 3 жыл бұрын
Me: Mechanical Engineer Also Me: Let's learn basics again from Dr. Tyson
@juanstepbehind 3 жыл бұрын
Lol same here!
@michaelcomisse9478 3 жыл бұрын
That makes me feel better about being quite science educated but still enjoying a video about stuff I already know :)
@omartrachen6794 3 жыл бұрын
I know right, i am a materials engineer and i still see those basics from NDT... He is the best
@vansdan. 3 жыл бұрын
I enjoy watching videos about things I already know because it helps drill it in so far it will never leave my brain
@mosheswisa 3 жыл бұрын
lol same here too but you can't miss an explainer with Neil
@naveenkumarp3812 3 жыл бұрын
Very informative after 11:00
@OUTSHADES 3 жыл бұрын
I really wanna know what's NDT's take on formation of our Moon 🙏🙏
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