How to calculate the size of a Black Hole?

[@Asaad-Hamad]

What a coincidence, I was just playing around with the Schwarzschild radius formula using chatgpt, I was applying it on many objects but not the cat, Schwarzschild got this wearied outcome while he was playing with relativity math on the front in the first word war, but Einstein thought it's impossible to find object like that in the universe and that was pure mathematical outcome, until Oppenheimer and his student confirmed it. Nothing will happen to the moon and it will still be experiencing the same mass effect although it's volume was changed. Thanks for the video.

[@PhysicsMadeEasy]

Yes it’s funny how Einstein did these amazing theoretical discoveries, didn’t believe in his own results, and that these end up being correct. A repeating pattern with this guy (other example, the cosmological constant), maybe that is the trait of a real genius… haha The moon: think again… 😉. You mentioned the volume changes… Like I answered another comment, think about why there are tides on Earth, and the effect it has on the motion of the moon… (and don’t cheat, no chat GPT! Lol!)

[@Asaad-Hamad]

@@PhysicsMadeEasy Although I can't imagine my life without chatgpt cuz he my only friend for the time being, but let me be more accurate, the moon will still be experiencing the same gravitational pull from the earth since it is still the same mass, but since the volume changed so I think you must be referring to the change in center of gravity, the moon will still attract the earth black hole with its mass, but if any object came within the original radius of the previously existed earth before, then it will experience increased force from the graviton field - since I believe in QFT for all forces - 😊.. I hope I missed nothing out and thanks for the stress you caused for banning my soulmate😅

[@PhysicsMadeEasy]

@@Asaad-Hamad The center of gravity is still the same… and the force on the moon is also the same, I agree. And I am not referring to an hypothetical external object that would pass by a distance to the black hole less than the Earth Radius… Ask yourself this question: When the moon causes the tides… it makes the water move, right ? So the moon provides energy… What is the consequence of this work done by the moon on its own energy? About chat GPT, it’s nice to know I am not alone haha ! I am joking, but actually half-way joking . During times of crisis, it provides amazing psychological support, by proposing solutions and ways of thinking that are very useful to feel better. I went through a few rough patches recently, and it has been an incredible support. And it is incredibly patient. In a way, I find this troubling, even a little disturbing… and I am only on GPT 4o, not o1 !

[@Asaad-Hamad]

@@PhysicsMadeEasy Ah. I see were are you going, since the moon is doing less work so he will keep this energy for him, so his mass will increase, but the total binding energy of the earth black hole and the moon will still be the same, the tide arises because the earth is spinning and alternatively exposing the water areas to the moon's gravity, same as if you have spinning ferromagnetic liquid sphere in the outer space in magnatic field, the sphere will be stretched toward the field source. May be we should be thankful to the hard times cuz it pushed us out of comfort zone, because of LLMs not only chatgpt, first time I wrote paper, but like Newton, I will keep it for myself🙃

[@SoimulPatriei]

I remember purchasing one of your courses on electricity from Udemy, and I really enjoyed it at the time. Do you have any plans to create more courses in the future?

[@PhysicsMadeEasy]

Hi, I am really glad you enjoyed my course. Thank you for the feedback! I actually had in mind to do a part II where I would dive into solving circuits (The video "what is an electric potential" on youtube was going to be one of the first of this course ). I even drafted a script if I remember well, but the lack of time left this project in a drawer... It takes months to make a good course (i do not release anything unless i am convinced the quality is high. Still, the idea does hang in the back on my mind to come back to Udemy. I'll let the Physics Made Easy community know if something like this happens ! And I am wondering, what new course would you have liked to see?

[@SoimulPatriei]

@@PhysicsMadeEasy , I can only speak for myself, but I enjoyed your short presentation on Einstein's theory of relativity. In fact, I remember you also had a video where you discussed particle physics and how everything is a form of vibration, which I found fascinating. So, any course on these topics would definitely interest me.

[@PhysicsMadeEasy]

@@SoimulPatriei Relativity is interesting, but not really my cup of tea. I did a video about it because it has entered one of the programs I teach in real life, so to have fun looking into it, I made a video! Particle physics, on the other hand, that's a real hobby. There is a full course on the channel itself. It could have been a paid course, but I kept it free. Check the playlist "Particle Physics", the 8 first videos (2 teasers, 6 lessons) could be the course!

[@kaeez]

I don't think it would make any difference in regards to the Moon-Earth system if the Earth were to suddenly transform into a blackhole as I suppose the only 'entity' that comes into play at that scale would just be the gravitational force and since that only depends on the masses and the distance between the center of masses , which in both case is still the same I don't think there would be any difference. Not sure if there will be any other implications though, correct me if I'm wrong doc.

[@PhysicsMadeEasy]

Hi Kaeez, I give you hint... think about tides: why are there tides? and what consequences do these have on the motion of the moon? :-)

[@kaeez]

​@@PhysicsMadeEasy Thanks for replying! And yes, from my vague understanding, tides are caused by the mutual interaction of the gravitational forces of the Moon and the Sun on the Earth right? But since the Earth is a black hole now, I don't think we would have any tides lol? Or is tidal force a more broader term that I'm not understanding? Would love to hear from you.

[@danieldanieldadada]

I imagine those tides are caused during the reduction in volume of the Earth

[@PhysicsMadeEasy]

@@kaeez You are on the right track... there would be no more tides, because their cause, the force differential due to the moon (and the sun), would become extremely small. Think about the effect the fraction of the tides created by the moon have on the moon's motion today...

[@PhysicsMadeEasy]

@@danieldanieldadada Hi Daniel. I am talking about the tides today, with the Earth as a planet... what causes them, and what effect does it have on what causes them ?