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).
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.
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.
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.
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.
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.
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.
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!
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
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!
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 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!
@@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
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..
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.
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.
🎯 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 ```
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.
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!!
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!👍🏼👌🏽🥳
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
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?
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.
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.
4 года назад
Neal explain the Eötvös effect. I think it is a interesting topic to talk about.
I would like it to have a Startalk on why ice floats. I'm studying in water treatment/management in Québec, Canada. The teacher just told us that water was the only substance that expands when it gets colder. Is it true it's the only one? She told us it is because of how the molecules arrange themselves, but she did not expand on this. I'm curious to know more. Why do the molecules behave like this for water and how does this compare with molecules of other substances? By the way, I often answer the teacher's questions with stuff I learned from NdGT, so thank you for what you are doing. My life benefits from it greatly! Take care!
Water is the BEST KNOWN substance that expands when it freezes... and, therefore, becomes less dense and floats on liquid water. However, it is not the ONLY substance that does this. Liquid water has molecules densely packed but they slip by one another, therefore liquid. In solid water the molecules arrange themselves so that hydrogen bonds between different molecules hold them in a specific place. This happens to be a larger volume than when the molecules were in liquid state. Google it. It is a basic chemistry idea. Your teacher is only spouting stuff that she was told and hasn't really studied it in depth. Google this: substances that are less dense as solids than liquids
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.
I got a question: "The apparent weight is equal to the actual weight when the frame is moving with a constant velocity either in upward or downward direction. " Is this the condition of weightlessness?? If I am in a lift which is moving with constant velocity(net acceleration=0), will I experience weightlessness(my weight=0) then?? If I am in lift whose wire is snapped, will I experience weightlessness? I got some confusions with weightlessness. Can weightlessness be there when when lift is moving with constant velocity?
Weightlessness can only happen in a state of _freefall,_ meaning that an object's trajectory is determined by gravity alone, and nothing else. A lift moving at constant velocity regardless of direction is _not_ in freefall, since any object in true freefall here on Earth would be increasing its downward speed by about 9.8 metres per second every second. Skydivers in so-called freefall before deploying their parachutes aren't really freefalling since their downward acceleration is slowed down and stopped by air resistance after a few seconds. After that, they fall at near constant speed (called _terminal velocity_ ) since the two opposing forces gravity and air resistance cancel each other out.
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.
@@nHans i am unsure, i am not talking about how easily an object returns to the surface of the water. More of if you can increase the amount of cohesion happening beneath an object can it float.
It wasn't mentioned in the vid but since weight is a measurement of the Force of gravity the units of measurement for weight the same as those for Force. That's ounces/pounds/tons in the imperial system and Newtons for the metric system (which if remember my physics is kilogram*meters per second squared)
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!
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 🙂
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?
"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.
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.
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!
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.
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...
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.
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.
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?
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
The only explainer video where these guys talk about the topics of future explainer videos. They better make those videos soon
With this episode you have me excited for some cool future explainers!!!
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"
Wow my eyes are open now I have been using these words for years and not really known the meaning thanks Dr Tyson
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
chuck is one of the reason i watch startalk
That’s my favorite ndt story. That was an excellent explanation of the scientific process
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
Do an episode on buoyancy alone and the misconceptions. Would be awesome
Thats really really awesome video..it actually blowed my mind twice.
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!
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 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!
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
Chuck makes these episodes great
I really wanna know what's NDT's take on formation of our Moon 🙏🙏
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.
Neil and Chuck should do experiments in StarTalk Explainers👍👍
Neil, you're just wonderful! Can't wait to hear about the ice expanding! Be safe. Be well! .....Canada
Please do the ice expanding explainer!
I love the epiphany moment Chuck has about ice expanding at the end :)
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..
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.
Do an explainer on precision vs accuracy in physics.
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.
Sat my 9yo down for this one, and she understood every bit of it. Pretty neat to see
We need some startalk merch! @StarTalk ! When are we getting new startalk merch guys? :)
Would love a rant on the various right-hand and left hand rules in physics...
@StarTalk, if it’s winter on the Northern Hemisphere and summer in the Southern Hemisphere, what season is it at the equator?
Love Star talk chat,thank you for sharing Gentlemen.
That's best edutainment channel !
I hate the banter. I just want the information. Thanks for sharing, though. The effort is appreciated, non-the-less.
I can watch these two all day
Do an ICE explainer please! Your explanation on JRE about water/ice was amazing 😁
Thanks for helping me with my physics class
Chuck is the best!
I love StarTalk!
🎯 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
```
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.
Neil you guys should do a precision vs accuracy explainer.
Please explain the physics of swimming sometime prof Neil.
Can we get video explaining displacement please
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.
best youtube channel.
Sooo great!
I am enjoying this so much!
Thanks thanks thanks
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!👍🏼👌🏽🥳
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.
Astrophysicist is the profession.
@@romanlee8287 thanks
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
Keep posting interesting contents like this!
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?
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.
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.
Neal explain the Eötvös effect. I think it is a interesting topic to talk about.
NOOO!!!
MORE Chuck tomorrow 🥺💕
You two are the best.
Humour helps comprehending heavy stuff
the explainer about the equator sounds interesting
has he done one?
Love these explained videos
Yes please, I want an Ice expanding video !!!!
Superbly explained... very animating ❤️
thank you! this is helpful!
I would like it to have a Startalk on why ice floats. I'm studying in water treatment/management in Québec, Canada. The teacher just told us that water was the only substance that expands when it gets colder. Is it true it's the only one? She told us it is because of how the molecules arrange themselves, but she did not expand on this. I'm curious to know more. Why do the molecules behave like this for water and how does this compare with molecules of other substances? By the way, I often answer the teacher's questions with stuff I learned from NdGT, so thank you for what you are doing. My life benefits from it greatly! Take care!
Water is the BEST KNOWN substance that expands when it freezes... and, therefore, becomes less dense and floats on liquid water. However, it is not the ONLY substance that does this.
Liquid water has molecules densely packed but they slip by one another, therefore liquid. In solid water the molecules arrange themselves so that hydrogen bonds between different molecules hold them in a specific place. This happens to be a larger volume than when the molecules were in liquid state. Google it. It is a basic chemistry idea.
Your teacher is only spouting stuff that she was told and hasn't really studied it in depth.
Google this: substances that are less dense as solids than liquids
Quite the contrary: we love Chuck!!!
Could you guys explain centrifugal force vs centripetal force?
Gosh dang, I think I finally get the difference weight vs mass.
Hey i want to see an explainer of ice on water and why there is less sun in the ecuator!
Isn't centrifugal the motion and centripetal is the name of the force being applied?
This is perfect timing! I have a test on this on friday!🤣😂
So how did you do on the test? Did the video help?
I got a 100!😀😁😄😃
Science is entertaining to listen to with neil and chuck.
So great! I am also looking for „Ice expanding“
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.
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?
How do you calculate the mass of an object since it isn't simply its weight?
I got another story to impress my Girl. ♡ Thanks Science!
You both are amazing..
I got a question:
"The apparent weight is equal to the actual weight when the frame is moving with a constant velocity either in upward or downward direction. "
Is this the condition of weightlessness??
If I am in a lift which is moving with constant velocity(net acceleration=0), will I experience weightlessness(my weight=0) then??
If I am in lift whose wire is snapped, will I experience weightlessness?
I got some confusions with weightlessness. Can weightlessness be there when when lift is moving with constant velocity?
Weightlessness can only happen in a state of _freefall,_ meaning that an object's trajectory is determined by gravity alone, and nothing else.
A lift moving at constant velocity regardless of direction is _not_ in freefall, since any object in true freefall here on Earth would be increasing its downward speed by about 9.8 metres per second every second.
Skydivers in so-called freefall before deploying their parachutes aren't really freefalling since their downward acceleration is slowed down and stopped by air resistance after a few seconds. After that, they fall at near constant speed (called _terminal velocity_ ) since the two opposing forces gravity and air resistance cancel each other out.
Yes star talk
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.
couldn't you also make an object flout by suffused the weight (among the surface of the water ) even with a higher density?
Are you referring to humans floating effortlessly in the Dead Sea?
@@nHans i am unsure, i am not talking about how easily an object returns to the surface of the water. More of if you can increase the amount of cohesion happening beneath an object can it float.
It wasn't mentioned in the vid but since weight is a measurement of the Force of gravity the units of measurement for weight the same as those for Force. That's ounces/pounds/tons in the imperial system and Newtons for the metric system (which if remember my physics is kilogram*meters per second squared)
Love it! Always a great show. This is much better than watching any politics learning something new.
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
where were you during my high school Physics class?
7:45 if creme is denser than skimmed milk, why does it contribute to more mass/weight gain than skimmed milk?