momentum before you actually make it into the hole so we have lots of ideas about structures that you could have that would enable Mass to move inward angular momentum to move outward like some kind of viscosity and discs and so on so our current understanding is you have some kind of feeding disc from which matter drains onto the black hole so this is a um a simulation from one of
Here, from about 200 people tested online. Angular is bitter. Round window frames, round floor plan, round, poof, round everything.
- A similar thing happens with a spinning bullet. Its angular momentum resists changes to its axis of rotation. So even if wind applies an unbalanced force to the bullet, it maintains its orientation.
Mass times velocity times radius. So angular momentum has the same units as action. And so what he decides to do is discretize the orbital angular momentum.
We can sub in de Broglies expression for the wavelength to get the two pi r equals NH over mv, but we can rearrange this to get the mvr. The angular momentum is equal to NH over two pi. That is precisely Bohr's quantized angular momentum condition.
Those of you who remember your physics would know that if you have something that's in as eccentric of an orbit as that, its angular momentum is going to be conserved. What does that mean?
But spin is conserved. Spin is angular momentum. It's part of that, right?
So round and white seems to be very sweet. Black and angular is not at all sweet. And we've done this research with the Alicia Foundation in Spain.
will keep rotating this way indefinitely. So the law of conservation of angular momentum comes from the rotational symmetry of the universe. Now, another important symmetry of this universe is time symmetry.
The angular momentum is equal to NH over two pi. That is precisely Bohr's quantized angular momentum condition. But now we have a good physical reason why it's quantized.
Because very often as musicians, we zoom in to the minutest detail. Having curved corners as opposed to angular ones, which are much more helpful for deaf people, for example,
But sometimes the wheel goes too fast. And you've got to have these angular momentum desaturation events, right, where you slow it down. You adjust it. But that slightly alters the trajectory of the spacecraft.
Gas, dust, ice, and so on. And because of conservation of angular momentum, it begins to form into a disk. And that disk, the elements in that disk, are what are called planetesimals and cometesimals.
That's the sample that's going to allow us to calculate the fraction of stars in our galaxy that host small, potentially habitable planets. 0.25% of the whole angular area of the sky, right?
Specifically, those who were eating from the round, white plate, say this tastes 10% sweeter, about 15% more flavorful than exactly the same dish served on a black plate. If that black plate was angular, it would taste even less. So round and white seems to be very sweet.
The closest star to us is almost right around a parsec away. And so the way this angular shift works-- everyone in this room is familiar with it-- if you hold your arm out, or your finger out at arm's length, and blink your eyes back and forth, you'll see your finger move across distant background objects.
What we're really measuring is the structure of the density of stars as you get further away from the Galactic Center, and as you get further away And you can see the angular size would cover an area much, much larger than the full moon.
So angular momentum has the same units as action. And so what he decides to do is discretize the orbital angular momentum. For no good reason he says, let me slap that on and say, and imagine the electron can only be in one unit, two units, three units of the same quantity H.
This comes out of nowhere. There seems like absolutely no good reason why angular momentum should be quantized. But by doing it, Bohr finds the correct energy levels of the hydrogen atom.
I mean, for instance, the energy of the atoms, it's quantized so that it's a quanta of energy, grains of energy, angular momentum for anything. You just discrete values instead of continuous values.
The two fine-tuned a method of determining longitude through lunar altitude observations, which is different than the usual stellar angle observations, which we don't need to get into. But basically, measuring the angular distance from the horizon to the moon and then comparing those observations with those in a place with a known time, like the observatory in Greenwich, where the zero line of longitude is.
I like fat, buttery words, such as ooze, turpitude, gluttonous, toady. I like solemn, angular, creaky words, such as straight-laced, cantankerous, pecunious, valedictory. I like spurious, black-is-white words, such as mortician, liquidates, tonsorial, demimonde.
- Perfect, I love that. - So what we just said was, angular momentum makes the ball hard to pivot. - Okay. - But what we saw was it pitches from this to this in four seconds.
The contractor, however, did it in-- because normally you do it in newtons or newton meters if you're doing torque. This is the sort of AMDs, so the Angular Momentum Desaturation events, where they're adjusting the flywheel.
terms of understanding how gas actually makes it into a black hole so one thing we still don't understand which is an unsolved problem although we have some ideas is how do you actually lose the angular momentum you have to lose the angular momentum before you actually make it into the hole so we have lots of ideas about structures that you could have that would enable Mass to move inward
This explains the principal. You can have two bands, two angular bands, if you like, and put colored strips of paper around them with different lengths and different colors and then twirl them around, taking advantage of the persistence of vision to see if the colors match,
So the first thing is that the parsec is the basic unit of distance that most astronomers use. And the reason that it's named a parsec is that it is the angular shift that you see for something that is a distance away.
When they were not thin, angular, and sallow, they were ruddy and soft.
She started with cobalt 60, an isotope of cobalt where the nucleus has an intrinsic angular momentum, or spin.
An electron at a given energy level actually has two possible states due to different orientations of its intrinsic angular momentum, spin up and spin down.
This imparted spinned the bullet as it shot out. And this is key because all spinning objects have a fundamental quantity they can serve, angular momentum. This helps them resist changes in their orientation.
we can see that it resists changes in its orientation. So if I give it a little touch, it reorients itself in the direction of its angular momentum. - A similar thing happens with a spinning bullet.
She proved that anytime you have a continuous symmetry, you get a corresponding conservation law. Translational symmetry gives you conservation of momentum, rotational symmetry gives you conservation of angular momentum, and time translation symmetry gives you conservation of energy. But these are all symmetries of a static empty universe.
Here we've got streamlined combined with pressure loss so you can see both the flow angularity.
a photo of him and I described this in the book you can find it online um he has a very angular face like extremely
fixed direction of the universe, say that there's a conservation of angular momentum.
than this distance, "Y", or angular distance "Y" number of degrees from the fovea on the right eye.
once you correct for the finer and finer spatial detail, higher angular resolution.
And what he wants to do is, he says there's something fishy about something being discrete that seems to be the new ambiguous weirdo lesson of the new quantum of action. Bohr realizes that as the electron goes around the nucleus, it has an angular momentum. Mass times velocity times radius.
Goodman of that era. They would have really fast tempo songs, angular lines, chromaticism, things like that, chromatic notes.
And if the older rocks were tilted at an angle before they're eroded, you've got yourself an angular unconformity.
So I took every single class that I could think of-- Alcoholics Anonymous, Narcotics Anonymous, Angular management.
So that is not a discovery as such, but the ability to deploy high-performance computing in real angular, which is what we do, to try to piece together
The dancing, Jerry Robbins could use Latin American dancing for the Sharks and then use all these different angular motions for the Jets.