
20220210: The Nature of Space and Time AMA
 00:03: ... of both space and time okay we start in this description with newtonian physics in which they're the dimensions that form the stage on which ...


20220112: How To Simulate The Universe With DFT
 06:03: In other words, Newtonian mechanics.
 07:15: In the Newtonian case, particles only interact locally, and that means the Newtonian equations of motion are what we call separable.
 07:46: ... fact in Newtonian mechanics we can not only write down the equations of motion for each ...
 08:02: But if we want to keep the quantum behaviour of quantum mechanics we can’t throw away most of configuration space like we do in Newtonian mechanics.
 10:54: Because they aren’t interacting, the equations of motion for these electrons are separable, just like in Newtonian mechanics.
 07:15: In the Newtonian case, particles only interact locally, and that means the Newtonian equations of motion are what we call separable.
 06:03: In other words, Newtonian mechanics.
 07:46: ... fact in Newtonian mechanics we can not only write down the equations of motion for each particle ...
 08:02: But if we want to keep the quantum behaviour of quantum mechanics we can’t throw away most of configuration space like we do in Newtonian mechanics.
 10:54: Because they aren’t interacting, the equations of motion for these electrons are separable, just like in Newtonian mechanics.


20211220: What Happens If A Black Hole Hits Earth?
 14:10: ... ways to break general relativity. There was the one on modified newtonian dynamics as an explanation for dark matter, and the one on fuzzballs  ...


20211110: What If Our Understanding of Gravity Is Wrong?
 02:52: ... Einstein found that Newtonian gravity breaks down when the gravitational field gets too strong  ...
 03:08: But Einsteinian gravity looks exactly like Newtonian gravity when gravitational fields get weak.
 03:18: What if Newtonian gravity breaks down both for very strong AND very weak fields?
 03:25: This is the idea behind Modified Newtonian Dynamics, or MOND, proposed by Israeli physicist Mordehai Milgrom in 1982.
 06:10: ... Instead it does what it was designed to do  it reproduces good ol’ Newtonian ...
 09:53: ... acted like Newtonian mechanics on solar system scales, like MOND on galactic scales, and like ...
 03:25: This is the idea behind Modified Newtonian Dynamics, or MOND, proposed by Israeli physicist Mordehai Milgrom in 1982.
 03:08: But Einsteinian gravity looks exactly like Newtonian gravity when gravitational fields get weak.
 03:18: What if Newtonian gravity breaks down both for very strong AND very weak fields?
 06:10: ... Instead it does what it was designed to do  it reproduces good ol’ Newtonian gravity. ...
 03:18: What if Newtonian gravity breaks down both for very strong AND very weak fields?
 02:52: ... Einstein found that Newtonian gravity breaks down when the gravitational field gets too strong  there you ...
 09:53: ... acted like Newtonian mechanics on solar system scales, like MOND on galactic scales, and like regular ...


20211102: Is ACTION The Most Fundamental Property in Physics?
 05:52: ... motivations in developing general relativity was the fact that Newtonian mechanics failed to correctly predict the orbit of Mercury. If you ...
 18:52: ... Constructor theory might be another alchemy, or it might be another Newtonian mechanics. Shall we find ...
 05:52: ... motivations in developing general relativity was the fact that Newtonian mechanics failed to correctly predict the orbit of Mercury. If you calculate that ...
 18:52: ... Constructor theory might be another alchemy, or it might be another Newtonian mechanics. Shall we find ...
 05:52: ... motivations in developing general relativity was the fact that Newtonian mechanics failed to correctly predict the orbit of Mercury. If you calculate that orbit ...


20211020: Will Constructor Theory REWRITE Physics?
 01:43: ... can derive all of thermodynamics and Newtonian mechanics and electromagnetism and so on from two master theories: ...


20210309: How Does Gravity Affect Light?
 01:17: ... picture, and that light behaves like any other particle in response to Newtonian ...


20201027: How The Penrose Singularity Theorem Predicts The End of Space Time
 00:34: ... even gravity worked as Newton had told us. In 1915, Newtonian gravity was superseded by Einstein’s general theory of ...


20201013: Do the Past and Future Exist?
 05:33: The representation of the block universe that I showed you is very Newtonian.


20200908: The Truth About Beauty in Physics
 02:27: Not only can Kepler’s complicated laws be derived from Newton, but Newtonian gravity makes predictions far beyond the motion of the planets.
 02:35: But even Newtonian gravity proved to be a special case of a much deeper law.
 02:27: Not only can Kepler’s complicated laws be derived from Newton, but Newtonian gravity makes predictions far beyond the motion of the planets.
 02:35: But even Newtonian gravity proved to be a special case of a much deeper law.


20200728: What is a Theory of Everything: Livestream
 00:00: ... like popper said then in that case the theory that newton of newtonian physics is really just as bad as the theory that earth is flat they're ...


20200608: Can Viruses Travel Between Planets?
 14:22: ... theory is modified newtonian dynamics  MONDS  in which gravity doesn’t drop off as quickly as the ...


20200511: How Luminiferous Aether Led to Relativity
 11:20: ... contradicts Galilean relativity, and so revealed a crack in the sacred Newtonian mechanics. This directly inspired Hendrik Lorentz to derive his Lorentz ...


20200203: Are there Infinite Versions of You?
 12:40: The solutions only exist in special cases for Newtonian gravity.


20191015: Loop Quantum Gravity Explained
 15:35: ... counters the gravitatinally attraction  if you'll forgive my crude Newtonian ...


20190923: Is Pluto a Planet?
 03:19: That same motion almost perfectly reflected the clockwork predictions of Newtonian mechanics.


20190424: No Dark Matter = Proof of Dark Matter?
 00:03: ... of gravitational theory itself the first such proposal was Mons modified Newtonian dynamics proposed by Mordecai Milgram in the early 80s the idea is the ...


20190130: Perpetual Motion From Negative Mass?
 03:19: OK, so how do negative masses work in Newtonian mechanics?
 03:28: In fact, in Newtonian gravity, any like masses – both positive or both negative  should produce a mutually attractive force.
 08:18: So far this seems to echo the Newtonian prediction.
 08:42: But this should crudely translate to the case of two equalsized objects, although not in the simple, linear style of Newtonian mechanics.
 03:28: In fact, in Newtonian gravity, any like masses – both positive or both negative  should produce a mutually attractive force.
 03:19: OK, so how do negative masses work in Newtonian mechanics?
 08:42: But this should crudely translate to the case of two equalsized objects, although not in the simple, linear style of Newtonian mechanics.
 08:18: So far this seems to echo the Newtonian prediction.


20190109: Are Dark Matter And Dark Energy The Same?
 04:26: But for now let’s follow the paper’s argument, which is based on Newtonian physics.
 04:31: In Newtonian gravity, you multiply the two masses together along with some other stuff to get the strength of their mutual gravitational attraction.
 04:58: Dr. Farnes takes the Newtonian argument a step further.
 05:43: According to this Newtonian interpretation.
 04:58: Dr. Farnes takes the Newtonian argument a step further.
 04:31: In Newtonian gravity, you multiply the two masses together along with some other stuff to get the strength of their mutual gravitational attraction.
 05:43: According to this Newtonian interpretation.
 04:26: But for now let’s follow the paper’s argument, which is based on Newtonian physics.


20180920: Quantum Gravity and the Hardest Problem in Physics
 02:49: But the Schrodinger equation treats space and time as fundamentally separate in the oldfashioned Newtonian way.


20180718: The Misunderstood Nature of Entropy
 10:22: ... the laws of motion, whether Newtonian or quantum mechanical, don't care about the direction of time, and yet, ...


20180516: Noether's Theorem and The Symmetries of Reality
 05:00: The law of conservation of energy is fundamental in Newtonian mechanics, in which space and time are unvarying and eternal.


20180418: Using Stars to See Gravitational Waves
 08:40: ... the existence of gravitational waves, he had to master it precursor, Newtonian ...
 08:56: ... already done some serious universitylevel physics, then mastering Newtonian gravity is also your next step toward understanding Einstein's view of ...
 09:10: ... from the basics of classical mechanics through the intricacies of Newtonian ...
 08:40: ... the existence of gravitational waves, he had to master it precursor, Newtonian gravity. ...
 08:56: ... already done some serious universitylevel physics, then mastering Newtonian gravity is also your next step toward understanding Einstein's view of ...
 09:10: ... from the basics of classical mechanics through the intricacies of Newtonian gravity. ...


20180214: What is Energy?
 01:53: Newtonian mechanics had only recently revolutionized physics.
 03:04: But that's just Newtonian mechanics.
 07:08: Newtonian mechanics is great at describing the motion of simple systems of a few rigid objects.
 07:56: ... its conservation has led to new types of mechanics that have supplanted Newtonian mechanics, for example Lagrange mechanics, which, in its simplest form, ...
 08:12: It produces the same equations of motion as Newtonian mechanics but without having to keep track of those innumerable fiddly force vectors.
 01:53: Newtonian mechanics had only recently revolutionized physics.
 03:04: But that's just Newtonian mechanics.
 07:08: Newtonian mechanics is great at describing the motion of simple systems of a few rigid objects.
 07:56: ... its conservation has led to new types of mechanics that have supplanted Newtonian mechanics, for example Lagrange mechanics, which, in its simplest form, follows the ...
 08:12: It produces the same equations of motion as Newtonian mechanics but without having to keep track of those innumerable fiddly force vectors.


20170119: The Phantom Singularity
 07:00: This gives us the same infinite gravitational pull as the Newtonian singularity.
 07:05: And just as with the Newtonian case, this gravitational singularity can only exist if infinite densities are possible.
 07:00: This gives us the same infinite gravitational pull as the Newtonian singularity.


20161221: Have They Seen Us?
 16:17: ... the escape velocity at the surface of the Earth because we're used to Newtonian approximations ...
 16:49: ... happen to get exactly the right size for the event horizon if you use Newtonian gravity to calculate the distance at which the escape velocity reaches ...
 16:17: ... the escape velocity at the surface of the Earth because we're used to Newtonian approximations ...
 16:49: ... happen to get exactly the right size for the event horizon if you use Newtonian gravity to calculate the distance at which the escape velocity reaches the speed ...


20160525: Is an Ice Age Coming?
 13:58: ... that the law of conservation of energy, as we learned when we studied Newtonian mechanics, is a feature of flat ...
 14:12: ... gravity from a Newtonian perspective requires the invention of a new quantity gravitational ...
 13:58: ... that the law of conservation of energy, as we learned when we studied Newtonian mechanics, is a feature of flat ...
 14:12: ... gravity from a Newtonian perspective requires the invention of a new quantity gravitational potential ...


20160518: Antigravity and the True Nature of Dark Energy
 11:35: This law is a property of a Newtonian universe, in which space and time are fixed static dimensions.


20160413: Will the Universe Expand Forever?
 02:16: ... let's develop intuition a bit by thinking about gravity from a Newtonian perspective as a force, rather than as an Einsteinian spacetime ...
 03:40: ... this Newtonian analogy and, remember, ignoring dark energy the universe also has an ...
 09:29: And to understand how does so will take us far beyond the capacity for Newtonian analogy.
 03:40: ... this Newtonian analogy and, remember, ignoring dark energy the universe also has an escape ...
 09:29: And to understand how does so will take us far beyond the capacity for Newtonian analogy.
 02:16: ... let's develop intuition a bit by thinking about gravity from a Newtonian perspective as a force, rather than as an Einsteinian spacetime ...


20160316: Why is the Earth Round and the Milky Way Flat?
 02:15: Here it's fine to think about gravity Newtonianly as a force rather than as an Einsteinian warping of space time.


20151125: 100 Years of Relativity + Challenge Winners!
 01:32: But for now we have some math to do and it's all going to be Newtonian.
 02:13: ... some Newtonian mechanics to see how much mass is needed to accelerate Apophis to get ...


20150923: Does Dark Matter BREAK Physics?
 04:05: The original modified Newtonian dynamics hypothesis, and it's a general relativity extensions, tries to give us this basic relationship for gravity.


20150827: Watch THIS! (New Host + Challenge Winners)
 00:09: There was a Newtonian and an Einsteinian version of the challenge.
 00:13: Let's start with the answer to the Newtonian version.
 00:15: ... key to the Newtonian challenge was getting an expression for the gravitational force on the ...
 01:26: This is kind of a coincidence of the specific situation of a uniformly dense planet and Newtonian mechanics.
 05:05: But remember, the Newtonian solution is also there.
 00:15: ... key to the Newtonian challenge was getting an expression for the gravitational force on the particle ...
 01:26: This is kind of a coincidence of the specific situation of a uniformly dense planet and Newtonian mechanics.
 05:05: But remember, the Newtonian solution is also there.
 00:13: Let's start with the answer to the Newtonian version.


20150819: Do Events Inside Black Holes Happen?
 07:03: ... Newtonian gravity, a projectile on the surface of a planet or a star needs a ...
 00:37: ... treat gravity Einsteinially rather than Newtonianially from the outset, it will help a lot if I can rely on technical terms ...


20150812: Challenge: Which Particle Wins This Race?
 00:59: ... Newtonian gravity, you can work out an expression for the orbital speed of this ...
 03:35: Use the subject line "Twoparticle Newtonian gravity challenge".
 05:16: ... can enter the Einsteinian challenge at all, that means you can solve the Newtonian challenge in about 60 seconds, which isn't much of a ...
 05:29: But you also have more time, and both the Newtonian and Einsteinian versions of the question are pretty fun exercises.
 05:16: ... can enter the Einsteinian challenge at all, that means you can solve the Newtonian challenge in about 60 seconds, which isn't much of a ...
 00:59: ... Newtonian gravity, you can work out an expression for the orbital speed of this particle in ...
 03:35: Use the subject line "Twoparticle Newtonian gravity challenge".
 00:17: For the purposes of this challenge, I want you to treat gravity and all physics Newtonianly.


20150805: What Physics Teachers Get Wrong About Tides!
 02:01: Assumption one we're going to use Newtonian gravity.
 03:09: And in Newtonian physics, it's fake.
 13:18: In the Newtonian sense, acceleration would mean put a frame of reference at Earth's center.
 02:01: Assumption one we're going to use Newtonian gravity.
 03:09: And in Newtonian physics, it's fake.
 13:18: In the Newtonian sense, acceleration would mean put a frame of reference at Earth's center.


20150729: General Relativity & Curved Spacetime Explained!
 02:08: ... Newtonian gravity would just be an additional force we introduced, like any other ...
 08:22: So we often think in Newtonian gravitational terms, because it's easier, and because the resulting errors are usually small.
 02:08: ... Newtonian gravity would just be an additional force we introduced, like any other force, ...


20150722: SPECIAL ANNOUNCEMENT + Flat Spacetime Geometry Comments
 02:58: Remember, in Newtonian physics, there's no unambiguous answer to that question, because you can only talk about motion relative to other things.
 03:22: Those are the guys that, it turns out, corresponds to inertial observers in Newtonian physics.
 02:58: Remember, in Newtonian physics, there's no unambiguous answer to that question, because you can only talk about motion relative to other things.
 03:22: Those are the guys that, it turns out, corresponds to inertial observers in Newtonian physics.


20150715: Can You Trust Your Eyes in Spacetime?
 01:30: Pretend the world has no gravity, Newtonian or otherwise.
 06:38: In Newtonian mechanics, we distinguish inertial and noninertial observers dynamically by using the floating ball test.


20150708: Curvature Demonstrated + Comments
 06:34: ... the curves and vectors in that space mean, and how it helps explain away Newtonian ...


20150702: Can a Circle Be a Straight Line?
 01:21: ... how it lets you account for the motion we observe even if there's no Newtonian force of ...


20150617: How to Signal Aliens
 07:26: ... pointed out that you can distinguish ordinary celebration from real Newtonian gravity, because real gravity will vary in strengths slightly at both ...
 09:42: All directions are equivalent in the absence of some kind of real gravity in the Newtonian sense picking out some direction.
 07:26: ... pointed out that you can distinguish ordinary celebration from real Newtonian gravity, because real gravity will vary in strengths slightly at both ends of a ...
 09:42: All directions are equivalent in the absence of some kind of real gravity in the Newtonian sense picking out some direction.


20150603: Is Gravity An Illusion?
 01:49: Now in Newtonian physics, inertial frames are special because Newton's second law, F equals ma, is only valid in inertial frames.
 02:41: Inertial frame and nonaccelerating frame are synonyms in Newtonian physics.
 03:26: There's something else familiar that makes people, books, and elephants accelerate in lockstep the Newtonian force of gravity.
 05:31: Now in Newtonian physics, this is just an accounting trick that has no broader significance.
 03:26: There's something else familiar that makes people, books, and elephants accelerate in lockstep the Newtonian force of gravity.
 01:49: Now in Newtonian physics, inertial frames are special because Newton's second law, F equals ma, is only valid in inertial frames.
 02:41: Inertial frame and nonaccelerating frame are synonyms in Newtonian physics.
 05:31: Now in Newtonian physics, this is just an accounting trick that has no broader significance.
 01:49: Now in Newtonian physics, inertial frames are special because Newton's second law, F equals ma, is only valid in inertial frames.


20150429: What's the Most Realistic Artificial Gravity in SciFi?
 00:53: Whether you want to think of gravity in the Newtonian or the Einsteinian sense, the problem persists.
