Physics

I don’t believe the world is flat, but what is the evidence for the theory that it is a sphere? Is it approximately a sphere? And why would the planets form as a sphere in the first place? Would you say intelligent design or gravity is circular? Why can’t it be a cube with an irregular 3d surface that approximates a sphere? I’m quite serious. Why are we not looking for planets in different shapes? And why are black holes logarithmic spirals? I want to write a sci-fi story where instead of using ships to explore space we instead grow the Earths atmosphere. I mean we make space livable by growing the Earth’s protective atmosphere layers. No need for oxygen you already h…

If we were going to terrafotm Venus, besides cooling her down and giving her a breathsble atmosphere and a magnetic field, I guess we'd need to speed up her incredibly slow rotation to give a 24h day. I've read that this vould be theoretically achieved, if 2 or 3 asteroids about 350km across were fired at Venus in quick succession, presumably from the asteroid belt. But it's difficult to see how such huge bodies could be moved. However if a load of small asteroids with nuclear rocket engines all crashed together at 1 particular point, and at the right trajectories, could the resultant lump of rock and debris then speed towards Venus to do the job? A bit like snooker? Ch…

Introduction I think most of you are familiar with Newton Issac and Albert Einstein's gravity theory which seem to involving gravitational relationship between objects, whereas this I approach is singular (focus on an object or object's gravitational individuality as possibly fundamental which relation / relativity (e.g. general relativity theory) happen possibly because of it. Diagram A diagram of the gravity equation formulation developed by myself as part of self-learning with the gravity within both classical physics and quantum physics although is singular for time being, supposedly applies to an individual object - but not yet approach relation / relativity (e.g. ge…

I have always been comfortable with Quantum Mechanics' Shrodinger Equation but never made the jump to the relativistic QM formulation in my ( undergrad ) Physics education ( 45 yrs ago ). I knew of the Klein-Gordon equation and PAM Dirac's contributions, but never really had a need for a relativistic interpretation. Then I saw this guy's latest video, which explains how Klein-Gordon fails as a useful methodology, and introduces Dirac's matrix formulation. I hope others will find this as enlightening as I did The second part of this will delve into the prediction of anti-matter. I love this guy's videos Physics Explained - YouTube for their ease of understan…

and what would a definition of a "clock" be? Any oscillation can be used as reference to define some kind of time. the neutrino oscillation is an active research topic that is not yet fully understood. as of now, assuming the neutrino having a mass is just as much speculation given our current experimental results. There are even some conflicting data which are partially at odds with invariant nature, though there may still be other explanations. there is a reason why Lorentz violation is considered, including experiments that could test for it.

Good day. Applying DC to electrodes in saline water; what disassociates / separates / deposits first on them, as voltage rises ? The hydrogen and oxygen; or chlorine and sodium ? What determines which go first ? Salt is already ions in suspension, right ? Or becomes hypochlorite / hypochlorous acid ?

From what I have heard that is the time in the model approaches infinite density. Is there anything that would distinguish this universe from any other possible one? Is any asymmetry involved? Do quantum processes dominate for something as small as that ?(I don't know how small that actually is)

Hi, I ask this because it seems to me that randomness doesn't exist, I don't know what science/scientists think about this, and sorry for not having searched Google before posting E.g., when you throw dices, I believe 0% of the result is based on randomness, I believe 100% of the result has reasons, such as maybe the way the dices have been thrown, maybe the temperature of the room, the distance to the impact surface, its density... Is there some experiment that proves randomness exists?

I wonder if we could re-create a form of static electricity but stronger version (and hopefully safe too) of it for use onboard spacecraft and space station. I can picture mentally of an electricity that could flow through object(s) with mass then when that occur so, the object mass gain energy temporarily at a given time as long electricity flows through then surely sub-sequentially yield a stronger gravitational attraction. I imagine would have to make objects whose density have to accompany dense geometry in order to accommodate extra energy. But I'm not sure about objects' (e.g. which ore material etc) sustainability or endurance could / would be (e.g. lead to de…

The thinking occurs to me as this: The more shared mass objects (e.g. iron etc inside core) happen due to electromagnetism, would if high amount of that temperature melt iron etc in core resulting in core gravity?

Hello. Typical 12V lead-acid batteries eventually die because one of the six 2Volt cells becomes short-circuited and so far, there is no way to repair that. Happened to me last month on -20C days. The then-healthy battery was under trickle charge and when attempted to start, 10volts!, barely cranking. One shorted cell... garbage... replace with new. Question is, the short circuit dissipates a considerable amount of energy internally, damaging (or thawing!) something. But never heard of that happening. Why ? Where that one-sixth of the energy stored in the battery go ?

ABS plastic case provides some kind of protection against accidental hand shocks and tabletop case for 2.5" HDD hard drives? I know that HDDs have a mechanical needle and arm, some types of knocks or shocks scratch the magnetic disk

Can cold water be used to melt frozen water pipes in your home?

Can you think of black holes as infinite potential wells?

Hello I have read a few topics on gravitational theories. I must state my disagreement on the space warp theory to explain attraction, but I would like to pose a different question. I agree fully on the theory of mass density being the measure of gravitational force. That said, gravity itself is still a mystery. I am talking about the wave that interacts with mass. Like magnetism for instance. We know what a magnetic wave is and how to create it. What efforts are being made to discover the gravitational wave?

Hello. A coil with a laminated iron core, put to spin... Would it generate some electric current in its windings just because the faint earth magnetism is in the way ? -No permanent magnets involved-

This is with reference to the following recent short video by Sabine Hossenfelder: I must say that, while I don’t necessarily share all of her pessimism, I do find myself agreeing to some of what she says here. My problem though is that I have never myself worked in professional academia, and have only a peripheral awareness of how exactly funding, the “paper mill” etc work when it comes to research in the foundations of physics. I also haven’t read her book Lost in Maths. I am thus curious to hear from those on this forum who do work in professional academia - what do you think about her comments? Is there any merit in the notion that there are systemic is…

I was looking at a time clock, then I have had a thought about what if were to add a box or container with some water and floating object underneath it. The line connection between the floating object and the time clock. If gravitational influence affect the floating object at some levels, the floating object would tug or pull the tick pointer to move either speed up or slow down depending, yielding a possible and more accurate local time? The reasoning I follow is if more accurate local time, then less the need to adjust local time multiple of times or something like that. Or is my reasoning wrong or need a bit more learning about GR or SR or both? I have attac…

Greetings... You have a chunk of plutonium on your desk 🤥. What is the danger ? Is it its thermal emission; its electromagnetic radiowaves emission; other invisible emission; its dust particles emission; poisoning ionizing emission of (α),(β),(γ) rays ? What gets ionized nearby in its presence ? -The word radioactive confused with radiowaves to the public- If that chunk of plutonium on your desk is small as a grain of salt or larger as a golf ball, will it harm you slower or faster ? If that chunk of Pu is embedded in a plexiglas block; does it change anything ? 🤨

- Question "Gravity is the weakest of the four fundamental interactions of physics, approximately 1038 times weaker than the strong interaction, 1036 times weaker than the electromagnetic force and 1029 times weaker than the weak interaction. As a consequence, it has no significant influence at the level of subatomic particles.[4] In contrast, it is the dominant interaction at the macroscopic scale, and is the cause of the formation, shape and trajectory (orbit) of astronomical bodies." link: https://en.wikipedia.org/wiki/Gravity It seems to me that the gravity or gravitation adds or builds up in interaction from microscopic (e.g. sub-atomic particles) to macr…

Hello, guys. Me and my friend (I used to had a blog about cosmos, he is an astronomy student at very end) are fascinated by science so we started to write a book about different, strange or creative science questions that we will answer (mostly astronomy/physics/thought experiments). We decided to ask community here for ideas of these questions - what you would like to know, what intrigues you, what is interesting, what can sound fun. We have about ~40 questions for now, for example "what will happen when Sun disappears", "what will happen when you jump into a tunnel through Earth", "can Jupiter became a star", "how universe can end", "why teleportation is so problematic"…

hi, my name is Chris but please call me DJ UBER FUNK MASTER FRESH.. kidding im from the french part of Canada... so you can hate me all you like... please forgive me if my English isn't UK perfect i currently reside in the archipeligo of the Philippines to be closer to my daughter...... my question is as follows, is all energy, resource driven ??? to physically move my maple syrup flavoured butt i need calories.. food, to propel any vehicle i have forward, i need petrol, electricity or peanut oil (diesel) to get electricity, we either need coal, heavy oil, uranium... ... as for solar power, we need that big ball of fire in the sky and that i believe is…

Hi. On a recent thread about microwaving steam, a graph posted has this portion : Is the word vapour valid only for the pink area left of the vertical red line by 100C ? and steam the correct word for the area at right of that vertical red line by 100C ? If I leave a glass of water under my bed for a couple of weeks; it will be dry. Water turned to vapour, was never exposed to over 100C. If the same glass of water was exposed to over 100C, it turned to steam, not vapour. Am I wrong ? Or should the graph say GAS instead; that depending on temperature it can be vapour or steam ?

This might seem like a crazy thread but hear my logic behind it. Heat/Temperature is measured in kelvin based on SI units. But I propose two different ways to measure heat. Number one, hertz. Hertz I think is my favorite way of measuring heat. The reason is that I love waves. Waves are an accurate way of measuring a lot of things, and you can even measure heat in it. From what I learned, heat, or thermodynamic energy, is just particles moving up and down a bunch of times (Or in other words, a simple harmonic oscillator). If heat is a S.H.O, then you should be able to measure its frequency. Moving on, we have joules. I am also a fan of energy and heat can be expressed as t…