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.)
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.
@David Mudry 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.
@David Mudry 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.
@@EdwardHowton I still dont understand. Why do we today say i weight 80 kgs. Shouldnt we say i weight 80 Newtons of force? When i free fall and my velocity accelerates due to Earths gravity my mass doenst change but my force does. And how do we calculate one's mass? If i weight lets say 80kgs (on earth) so is my mass 80 divided by 9.81? And if i am on the ground and my acceleration is 0, shouldnt my mass be zero becouse m=F x a, and (a=0).
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.
Listening to the StarTalk podcast always takes me on a nostalgic trip down memory lane, reminding me of my high school science classes. I have fond memories of physics, chemistry, biology, and agricultural science lessons that laid the foundation for understanding concepts like mass, weight, and density. It's fascinating to revisit how mass is the amount of matter in an object, weight is the force of gravity acting on that mass, and density is the mass per unit volume. I’m truly grateful to all my teachers and the school administration for their excellent work in making these subjects so engaging and informative. I also want to extend a heartfelt thank you to my university lecturers and higher education module leads for their dedication in providing me with deeper insights into the scientific world. Additionally, my work mentors and supervisors have been instrumental in teaching me both research lab work and the theoretical and practical thinking that have been invaluable in my career. Thank you to Neil and Chuck for a job well done on the StarTalk podcast; you guys rock! How do you think our early education in science shapes our understanding of the world today?
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.
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.
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 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.
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.
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
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!
@@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.
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.
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!!
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 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
🎯 Key Takeaways for quick navigation: 00:44 🌌 *When on a diet to lose weight, you're actually losing mass, not just weight. Consuming fewer calories than you burn leads to weight loss.* 01:42 ⚖ *Mass is the sum of all particles in an object. Weight depends on gravity, so you weigh less on the Moon but retain your mass.* 03:37 🌍 *Weight varies due to gravity differences (e.g., equator vs. pole). Weight loss programs are essentially mass loss programs.* 05:54 🚢 *Density, not weight, determines if something floats. Objects less dense than water float, explaining phenomena like wood and steel boats.* 11:21 📏 *Density is mass divided by volume. Increasing density means cramming mass into a smaller volume, and vice versa.* 13:43 🦴 *Objects float if less dense than water, regardless of weight. Fat is less dense than muscle and bones, explaining buoyancy.* Made with HARPA AI ```
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!
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!
No ‘less check tomorrow!’ These videos will turn into ‘Neil teaches’ instead of ‘Learn with Chuck’, which is much more inviting when you’re a layman like myself!
I have touted my 2 step weight loss plan for decades when talking about dieting. 1. Reduce caloric input. 2. Increase caloric output. Simple as that. You don't need a keto diet, Atkins, weight watchers, Jenny Craig, Nutrisystem, etc.
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
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.
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.
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!
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.
13:27 - Not true. Water striders are not less dense than water. Because of surface tension their legs make indentations on the water so the "water displacing air" is outside its body. So the air won't count on the average density calculation.
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.
You defined weight. Was "Mass" defined in this video? Some of all particles?? How do you calculate the sum though? By knowing how many particles are there in a given weight or volume of a material. Volume varies in dfferent temperature. Is there a table or graph for it? There must be. So the mass is still weight dependent..
Yeah Neil, please explain the little sun on the aquator thing. It's hot there because the sun rays directly hit it... or so i thought. We await for you to... (*voices in the distances shouting "don't you dare say it"*) enlighten us.
it's less mass of atmosphere that sunlight penetrates and deposits heat into, when it shines straight down onto the equator. But the atmospheric currents and other effects distribute the heat. Weather is a consequence of energy trying to disperse evenly.
@@Purrfect_Werecat Yeah, prolly more water evaporation at the equator, meaning more clouds and rain in the "rainforests" resulting in less sunny, cloudless skies per year.
For those in the know, calculating physics in the foot/slug/second unit system is identical to using the meter/kg/second system accelerating one slug one ft/S^2 requires one pound of force. 1 1 1 1 accelerating one kg one meter/S^2 requires one newton of force. 1 1 1 1 This is why they are called unit systems, unit means 1. Just the same, every equation in my aerodynamics texts can use either system with no changes or added steps.
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!👍🏼👌🏽🥳
Question: Why is the weight having the same unit as the mass while not beeing the same? For the weight you need the mass. Depending on the gravitational force and the mass the weight is resulting out of it. Anyone has an answer?
I mean.... Black holes being infinitely small, i guess that really doesnt apply because there'd be no real space for anything to float on regardless? xD
@@Purrfect_Werecat you talk singularity within the core of BH. BH itself is the area inside event horizon. Otherwise what would the Active Galactic Nuclei be? Sagittarius A* ?
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.
MR. TYSON, I want ask You question What and how do you think for Death in science way? What happens after we die? If there are video which explain this topic someone can send me link☺👍💋🍀
You step on a weighing scale on the earth. You find that it reads 70 kgs. This means that your mass is 70 kilos. Note: Weighing scales actually measure kgf (kilogram-force) which means they typically measure your weight (the force acting on you) then divide it by 9.81 (which is the acceleration due to gravity on Earth) which results in your mass. So what is your weight? We can use newtons second law to arrive at this answer ; F = ma ; m = mass = 70 kilos. a = accelaration of gravity on Earth = 9.81 m/s^2 Therefore your weight would be 70*9.81 = 686.7 Newtons. on moon you would weigh about 1/6 of that on earth. but your mass would be the same
Do airlines benefit from the passengers and the plane having lower weight at 40,000+ feet but the same mass (does lift depend on weight or just the mass of the passengers and plane?
Well, the passengers and the plane itself, the further away they get from the center of the earth the less force of gravity is pulling them down which i suppose saves some fuel. Imagine there is a giant magnet that is pulling you. The closer you stand to it, the more effort/energy you will require to walk away
In aerospace engineering we ignore this effect below 100,000 ft because it is almost non-existent: at 100,000 ft gravity is only 1% lower than at sea level (and only rocket powered aircraft can go this high). At 36,000 ft (common for airliners) gravity is only 0.3% less than sea level.
One on momentum, angular momentum, torque etc would also be nice.
*Nerd*
Inertia, momentum, kinetic energy. And with angular momentum in both a stationary hub reference and with a moving hub(like rolling down the road)
Motorcycle physics boi
YES WE DEFINITELY NEED IT HIGHSCHOOL PHYSICS
@@adamflynn7322 All of Newtonian physics.
At this point, Chuck is getting a free PhD just by being around Neil 😂
True lol
I think we all getting a little addicted
The way some people got honorary titles, Chuck certainly deserves at least one of those.
PhD isn't about acquiring old knowledge but creating new.
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.)
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.
Expertly explained, thank you sir
@David Mudry 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.
@David Mudry 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.
@@EdwardHowton I still dont understand. Why do we today say i weight 80 kgs. Shouldnt we say i weight 80 Newtons of force? When i free fall and my velocity accelerates due to Earths gravity my mass doenst change but my force does. And how do we calculate one's mass? If i weight lets say 80kgs (on earth) so is my mass 80 divided by 9.81? And if i am on the ground and my acceleration is 0, shouldnt my mass be zero becouse m=F x a, and (a=0).
very nice thankyou 🙂
"YOU JUST GOT SCIENCED"
Neil Degrasse Tyson, 21st century, 2020 (human calendar) , Milky way, Planet Earth.
You forgot to mention the Timeline!
It will show up on Google searches soon
Sol System, Earth
Humans have more than 1 calendar
12020, kurzgesagt calendar. My favorite so far.
I wish my Science teacher taught me like this, I wouldn't have taken Commerce and Accounts.
I sooo identify with this
That must have been a real interesting account class haha
But accounting involves a lot of math right ? It's still interesting.
I didn’t grasp what they were until I graduated high school tbh. Density was the hardest but I understand it now.
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.
Gotta say that these videos are more important to me during this time than you could ever know. Thank you for doing you!
Imagine entering a coffee shop and seeing Neil Degrasse Tyson outsmarting the waiter who lied to him haha. Tremendous.
Plot Twist: The waiter put the whipped cream in first and it got diluted when he poured the coffee...
Listening to the StarTalk podcast always takes me on a nostalgic trip down memory lane, reminding me of my high school science classes. I have fond memories of physics, chemistry, biology, and agricultural science lessons that laid the foundation for understanding concepts like mass, weight, and density. It's fascinating to revisit how mass is the amount of matter in an object, weight is the force of gravity acting on that mass, and density is the mass per unit volume. I’m truly grateful to all my teachers and the school administration for their excellent work in making these subjects so engaging and informative.
I also want to extend a heartfelt thank you to my university lecturers and higher education module leads for their dedication in providing me with deeper insights into the scientific world. Additionally, my work mentors and supervisors have been instrumental in teaching me both research lab work and the theoretical and practical thinking that have been invaluable in my career. Thank you to Neil and Chuck for a job well done on the StarTalk podcast; you guys rock! How do you think our early education in science shapes our understanding of the world today?
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.
Plus, air is free
... Probably weren't benefitting much from the soap anyways if your bathwater is murky...
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.
The selling point was a lighter soap with less soap and tiny air bubbles Ja Ja
@@jasonlueker3032 What are you talking about? Solid bars of ivory soap float just fine.
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.
Thats really really awesome video..it actually blowed my mind twice.
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.
I gather the milk in Ireland is pasteurized and blended
@@rd264pasteurised and homogenised, yes. Why?
I think Chuck gets an additional bonus in any gravitational situation because his humor is so uplifting. :-)
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
That was the marketing push. Really they just were adding some air.
@@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.
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.
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
Have a question: difference between neutron star, pulsars and quasars?
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!
easily found with a simple search online.
@@mavfan1 Yeah. I don't know why people ask a question that can easily have a solution found on the net.
@@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.
You forgot the coolest thing in the universe "BLAZAR"
@StarTalk, if it’s winter on the Northern Hemisphere and summer in the Southern Hemisphere, what season is it at the equator?
With this episode you have me excited for some cool future explainers!!!
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.
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!!
@@anthonyhamilton7778 Yes, and the denser core of Saturn would sink down into the ocean rather than Saturn holding together in one piece.
@@anthonyhamilton7778 so I’m guessing it would make a brown star
No, just no, F. go back and watch the video again.
I really wanna know what's NDT's take on formation of our Moon 🙏🙏
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!
These explainer videos are very useful. Dont stop making them. Thanks
They're still at it ✨
Mug u give cvg u I is m
Always
A little sanity in a crazy world
@@michaelcomisse9478 True, but what about Chuck? 😏
@@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
That’s my favorite ndt story. That was an excellent explanation of the scientific process
🎯 Key Takeaways for quick navigation:
00:44 🌌 *When on a diet to lose weight, you're actually losing mass, not just weight. Consuming fewer calories than you burn leads to weight loss.*
01:42 ⚖ *Mass is the sum of all particles in an object. Weight depends on gravity, so you weigh less on the Moon but retain your mass.*
03:37 🌍 *Weight varies due to gravity differences (e.g., equator vs. pole). Weight loss programs are essentially mass loss programs.*
05:54 🚢 *Density, not weight, determines if something floats. Objects less dense than water float, explaining phenomena like wood and steel boats.*
11:21 📏 *Density is mass divided by volume. Increasing density means cramming mass into a smaller volume, and vice versa.*
13:43 🦴 *Objects float if less dense than water, regardless of weight. Fat is less dense than muscle and bones, explaining buoyancy.*
Made with HARPA AI
```
Wow my eyes are open now I have been using these words for years and not really known the meaning thanks Dr Tyson
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!
chuck is one of the reason i watch startalk
Me: Mechanical Engineer
Also Me: Let's learn basics again from Dr. Tyson
Lol same here!
That makes me feel better about being quite science educated but still enjoying a video about stuff I already know :)
I know right, i am a materials engineer and i still see those basics from NDT... He is the best
I enjoy watching videos about things I already know because it helps drill it in so far it will never leave my brain
lol same here too but you can't miss an explainer with Neil
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!
We need some startalk merch! @StarTalk ! When are we getting new startalk merch guys? :)
Please do the ice expanding explainer!
The only explainer video where these guys talk about the topics of future explainer videos. They better make those videos soon
Less chuck tomorrow haha
Chuck died a little at 4:53 🥲
It's funny 'cause it's true.
No ‘less check tomorrow!’ These videos will turn into ‘Neil teaches’ instead of ‘Learn with Chuck’, which is much more inviting when you’re a layman like myself!
I like Chuck, I don't want less of him.
remove Chuck from show please. Thanks
I have touted my 2 step weight loss plan for decades when talking about dieting. 1. Reduce caloric input. 2. Increase caloric output. Simple as that. You don't need a keto diet, Atkins, weight watchers, Jenny Craig, Nutrisystem, etc.
7:45 if creme is denser than skimmed milk, why does it contribute to more mass/weight gain than skimmed milk?
Neil and Chuck should do experiments in StarTalk Explainers👍👍
Do an episode on buoyancy alone and the misconceptions. Would be awesome
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
I love the epiphany moment Chuck has about ice expanding at the end :)
Humour helps comprehending heavy stuff
Chuck makes these episodes great
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.
Chuck is the best!
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.
Neil, you're just wonderful! Can't wait to hear about the ice expanding! Be safe. Be well! .....Canada
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!
"Uncle Eddie. He's a big man, that's a fat brother." :DDD
Giggle 😋
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.
I can watch these two all day
Love Star talk chat,thank you for sharing Gentlemen.
13:27 - Not true. Water striders are not less dense than water. Because of surface tension their legs make indentations on the water so the "water displacing air" is outside its body. So the air won't count on the average density calculation.
Thanks for helping me with my physics class
Do an explainer on precision vs accuracy in physics.
Sat my 9yo down for this one, and she understood every bit of it. Pretty neat to see
Please explain the physics of swimming sometime prof Neil.
That's best edutainment channel !
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.
"So, if Chuck weighs the same as a duck..."
"He's made of wood."
"And therefore...?"
I was quite disappointed when he missed that opportunity.
A witch!
And therefore... He's a Wack? 😳
Are you making fun out of me
@@duck3468 Yes, we are, what are you going to do about it?
You defined weight. Was "Mass" defined in this video?
Some of all particles??
How do you calculate the sum though? By knowing how many particles are there in a given weight or volume of a material. Volume varies in dfferent temperature. Is there a table or graph for it? There must be. So the mass is still weight dependent..
Yeah Neil, please explain the little sun on the aquator thing. It's hot there because the sun rays directly hit it... or so i thought. We await for you to... (*voices in the distances shouting "don't you dare say it"*) enlighten us.
I am gonna guess they get more clouds or something thus less direct sun on the ground. I dont know how accurate that guess is.
It depends what you actually mean by 'little sun'. Neil probably meant daytime.
Remember that the Earth's axis is tilted. That's why we have the tropics of Cancer and Capricorn.
it's less mass of atmosphere that sunlight penetrates and deposits heat into, when it shines straight down onto the equator. But the atmospheric currents and other effects distribute the heat. Weather is a consequence of energy trying to disperse evenly.
@@Purrfect_Werecat Yeah, prolly more water evaporation at the equator, meaning more clouds and rain in the "rainforests" resulting in less sunny, cloudless skies per year.
For those in the know, calculating physics in the foot/slug/second unit system is identical to using the meter/kg/second system
accelerating one slug one ft/S^2 requires one pound of force. 1 1 1 1
accelerating one kg one meter/S^2 requires one newton of force. 1 1 1 1
This is why they are called unit systems, unit means 1.
Just the same, every equation in my aerodynamics texts can use either system with no changes or added steps.
Would love a rant on the various right-hand and left hand rules in physics...
I love StarTalk!
NOOO!!!
MORE Chuck tomorrow 🥺💕
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!👍🏼👌🏽🥳
I hate the banter. I just want the information. Thanks for sharing, though. The effort is appreciated, non-the-less.
Question: Why is the weight having the same unit as the mass while not beeing the same? For the weight you need the mass. Depending on the gravitational force and the mass the weight is resulting out of it. Anyone has an answer?
Keep posting interesting contents like this!
Neil you guys should do a precision vs accuracy explainer.
Do an ICE explainer please! Your explanation on JRE about water/ice was amazing 😁
Just look at the units.
Mass : kilograms (kg)
Weight: Newton (N)
Density: kilograms per cubic meter (kg/m^3)
best youtube channel.
I got another story to impress my Girl. ♡ Thanks Science!
thank you! this is helpful!
Love these explained videos
Superbly explained... very animating ❤️
Mass - the amount of atoms within an object.
Density- how tightly packed the atoms are within said object.
Weight- the pull of gravity on said object.
Very informative after 11:00
Can we get video explaining displacement please
Neal explain the Eötvös effect. I think it is a interesting topic to talk about.
Sooo great!
I am enjoying this so much!
Thanks thanks thanks
My happy place ❤️
So... Nothing can float a black hole.
Nothing can float a back hole, the black hole floats you, then eats you and spaghettifies you.
Neil's dense voice can!
I mean.... Black holes being infinitely small, i guess that really doesnt apply because there'd be no real space for anything to float on regardless? xD
@@Purrfect_Werecat you talk singularity within the core of BH. BH itself is the area inside event horizon. Otherwise what would the Active Galactic Nuclei be? Sagittarius A* ?
_Black holes float on the fluid of the universe itself_
-Deepak Chopra, probably
So great! I am also looking for „Ice expanding“
Yes please, I want an Ice expanding video !!!!
I want to know why there is very little sun on the equator
Gosh dang, I think I finally get the difference weight vs mass.
You two are the best.
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.
Science is entertaining to listen to with neil and chuck.
13:20 When you are a true American at heart.
MR. TYSON, I want ask You question
What and how do you think for Death in science way? What happens after we die?
If there are video which explain this topic someone can send me link☺👍💋🍀
So... When standing over a weighing machine and tells me the read in kg is it my actual mass or is it my weight in Newtons but with Kg on the right?
You step on a weighing scale on the earth. You find that it reads 70 kgs. This means that your mass is 70 kilos. Note: Weighing scales actually measure kgf (kilogram-force) which means they typically measure your weight (the force acting on you) then divide it by 9.81 (which is the acceleration due to gravity on Earth) which results in your mass.
So what is your weight? We can use newtons second law to arrive at this answer ; F = ma ; m = mass = 70 kilos. a = accelaration of gravity on Earth = 9.81 m/s^2
Therefore your weight would be 70*9.81 = 686.7 Newtons.
on moon you would weigh about 1/6 of that on earth. but your mass would be the same
Do airlines benefit from the passengers and the plane having lower weight at 40,000+ feet but the same mass (does lift depend on weight or just the mass of the passengers and plane?
Well, the passengers and the plane itself, the further away they get from the center of the earth the less force of gravity is pulling them down which i suppose saves some fuel. Imagine there is a giant magnet that is pulling you. The closer you stand to it, the more effort/energy you will require to walk away
@@EgmatXelugo But as a counter point, the higher a plane goes, the less air it has flowing over/under the wings to provide lift.
In aerospace engineering we ignore this effect below 100,000 ft because it is almost non-existent: at 100,000 ft gravity is only 1% lower than at sea level (and only rocket powered aircraft can go this high). At 36,000 ft (common for airliners) gravity is only 0.3% less than sea level.
You both are amazing..
Quite the contrary: we love Chuck!!!
I believe the word Neil was looking for was a "Billet" of wood
A round or a bolt would be more accepted terms.