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The physics of an O'Neill Cylinder, rotating fast enough to create artificial gravity through centrifugal force. Inside, objects curve "upward" because motion replaces mass, and every part of the habitat follows the same circular path. (Via scienceclic)

Brian Roemmele

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47,867 Aufrufe • vor 9 Monaten •via X (Twitter)

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🌀🌌 What if gravity isn’t really a force? Einstein’s general relativity gives us a radically different picture: mass and energy curve the fabric of spacetime, and objects follow paths shaped by that geometry. Even light bends when passing through strongly curved spacetime. In this view, planets aren’t simply being “pulled” by the Sun they’re moving through curved spacetime created by its mass. Gravity may be less like an invisible force… and more like the geometry of the universe itself. 🕳️✨

🌀🌌 What if gravity isn’t really a force? Einstein’s general relativity gives us a radically different picture: mass and energy curve the fabric of spacetime, and objects follow paths shaped by that geometry. Even light bends when passing through strongly curved spacetime. In this view, planets aren’t simply being “pulled” by the Sun they’re moving through curved spacetime created by its mass. Gravity may be less like an invisible force… and more like the geometry of the universe itself. 🕳️✨

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4D=/=Time. 3rd Dimension of Curved Space is made the same way as the Toroid. By rotating the Toroid Around it’s own Center Point to Form a Hyper-Toroid Everything is already in Circular Motion. With All points in Space moving in Circular Paths to Create an Endless Rolling Now.

4D=/=Time. 3rd Dimension of Curved Space is made the same way as the Toroid. By rotating the Toroid Around it’s own Center Point to Form a Hyper-Toroid Everything is already in Circular Motion. With All points in Space moving in Circular Paths to Create an Endless Rolling Now.

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Forget the “trampoline” analogy; it’s a 2D lie. Gravity isn’t a pull. It’s the metric deformation of a 4D manifold. Every mass is just a localized curvature gradient forcing the geodesics of spacetime to converge. You’re not “falling.” You’re simply following the path of least resistance through a warped continuum where Gμν = 8πTμν. The universe has no floor; only a geometry that refuses to stay flat. Credit: scienceclic

Forget the “trampoline” analogy; it’s a 2D lie. Gravity isn’t a pull. It’s the metric deformation of a 4D manifold. Every mass is just a localized curvature gradient forcing the geodesics of spacetime to converge. You’re not “falling.” You’re simply following the path of least resistance through a warped continuum where Gμν = 8πTμν. The universe has no floor; only a geometry that refuses to stay flat. Credit: scienceclic

Cosmos Archive

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A common misconception in physics is that gravity must be negligible at the quantum scale because its measured strength appears weak compared to electromagnetism and the strong nuclear force. However, this perception arises from considering gravity only in its weak field limit. Obviously, it will appear weak under such conditions, but the situation changes when we consider regions of high mass-energy density. For example, when examining strong gravitational fields near black holes, the force becomes immensely powerful. With this in mind, lets re-examine unification and gravity at the quantum scale: Following our holographic mass solution, elementary particles like protons are found to be microscopic Schwarzschild black holes and their mass-energy density is sufficient to create a gravitational curvature equivalent to the strong nuclear force. The vacuum energy density of space provides enough energy to maintain these structures through Planck-scale dynamics, preventing their rapid evaporation via Hawking radiation, so they are ultra-stable. These discoveries, expounded in our studies like The Origin of Mass and the Nature of Gravity, available to download for free on CERN's Zenodo preprint server-🔗 -demonstrate that what we observe as distinct fundamental forces are in fact manifestations of a unified force operating at different scales, where quantum vacuum fluctuations significantly curve spacetime (the curvature being gravity) with the resulting encapsulation generating screening effects that modulate the apparent strength of gravity from its fundamental high-energy state, which results in nuclear confinement forces, to its familiar weak-field behavior that appears as regular Newtonian gravity.

A common misconception in physics is that gravity must be negligible at the quantum scale because its measured strength appears weak compared to electromagnetism and the strong nuclear force. However, this perception arises from considering gravity only in its weak field limit. Obviously, it will appear weak under such conditions, but the situation changes when we consider regions of high mass-energy density. For example, when examining strong gravitational fields near black holes, the force becomes immensely powerful. With this in mind, lets re-examine unification and gravity at the quantum scale: Following our holographic mass solution, elementary particles like protons are found to be microscopic Schwarzschild black holes and their mass-energy density is sufficient to create a gravitational curvature equivalent to the strong nuclear force. The vacuum energy density of space provides enough energy to maintain these structures through Planck-scale dynamics, preventing their rapid evaporation via Hawking radiation, so they are ultra-stable. These discoveries, expounded in our studies like The Origin of Mass and the Nature of Gravity, available to download for free on CERN's Zenodo preprint server-🔗 -demonstrate that what we observe as distinct fundamental forces are in fact manifestations of a unified force operating at different scales, where quantum vacuum fluctuations significantly curve spacetime (the curvature being gravity) with the resulting encapsulation generating screening effects that modulate the apparent strength of gravity from its fundamental high-energy state, which results in nuclear confinement forces, to its familiar weak-field behavior that appears as regular Newtonian gravity.

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The arm doesn't "catapult" into release, it unwinds from the inside-out along a spiral path as a result of trunk rotation.⁠ ⁠ This centrifugal force pulls the elbow into extension and allows the natural whip-like mechanism to occur. 🌪️⁠

The arm doesn't "catapult" into release, it unwinds from the inside-out along a spiral path as a result of trunk rotation.⁠ ⁠ This centrifugal force pulls the elbow into extension and allows the natural whip-like mechanism to occur. 🌪️⁠

Tread Athletics

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The Dance of Three Masses on a Warped Spacetime Fabric Newtonian Gravity says masses attract one another through force. General Relativity changes the picture by treating gravity as geometry itself, where matter shapes Spacetime, and motion follows that evolving curved structure. In a three-body system, the bodies are not just pulling on each other. They are moving through a geometric landscape that shifts as the mass arrangement changes.

The Dance of Three Masses on a Warped Spacetime Fabric Newtonian Gravity says masses attract one another through force. General Relativity changes the picture by treating gravity as geometry itself, where matter shapes Spacetime, and motion follows that evolving curved structure. In a three-body system, the bodies are not just pulling on each other. They are moving through a geometric landscape that shifts as the mass arrangement changes.

Mathelirium

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If gravity is powerful enough to keep billions of tons of ocean water stuck to a spinning ball Earth like glue... Why can a butterfly drift effortlessly through the air? 🦋 Why does smoke rise, soap bubbles float, and dandelion seeds glide upward? Under the very same force that's said to hold entire oceans in place? 🤨 If gravity explains why water stays down... Why does density suddenly explain why lighter objects move up? ⚖️ Shouldn't one force produce one consistent result...instead of different explanations for different situations? 🤔 [h/t conspiracy_peterx on IG]

If gravity is powerful enough to keep billions of tons of ocean water stuck to a spinning ball Earth like glue... Why can a butterfly drift effortlessly through the air? 🦋 Why does smoke rise, soap bubbles float, and dandelion seeds glide upward? Under the very same force that's said to hold entire oceans in place? 🤨 If gravity explains why water stays down... Why does density suddenly explain why lighter objects move up? ⚖️ Shouldn't one force produce one consistent result...instead of different explanations for different situations? 🤔 [h/t conspiracy_peterx on IG]

Ben Wehrman

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Why does a spinning object speed up as it shrinks? This Hoberman sphere demonstration illustrates the law of conservation of angular momentum. Moment of inertia measures how mass is distributed relative to the axis of rotation. When the sphere collapses, its mass moves inward. This decrease in inertia forces the angular velocity to increase because the total momentum of the system must remain constant. This same principle allows figure skaters to accelerate their spins and causes collapsing stars to become rapidly rotating pulsars. It is a fundamental rule of physics. Geometry determines speed. Video Credit: Physics Demos

Why does a spinning object speed up as it shrinks? This Hoberman sphere demonstration illustrates the law of conservation of angular momentum. Moment of inertia measures how mass is distributed relative to the axis of rotation. When the sphere collapses, its mass moves inward. This decrease in inertia forces the angular velocity to increase because the total momentum of the system must remain constant. This same principle allows figure skaters to accelerate their spins and causes collapsing stars to become rapidly rotating pulsars. It is a fundamental rule of physics. Geometry determines speed. Video Credit: Physics Demos

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Jensen Huang says the next frontier is physical AI — systems that understand the physical world and causality A child naturally recognizes the basic physics of tipping over dominoes (gravity, mass, contact) LLMs have no idea "we have to create a new type of physical AI"

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A Triple Spring-Mass Pendulum Just for The Fun of Physics We model the mass positions as r₁ = (x₁, y₁), r₂ = (x₂, y₂), r₃ = (x₃, y₃) with y positive downward in the simulation. The three spring segments are r₁ = r₁ − (0,0) r₁₂ = r₂ − r₁ r₂₃ = r₃ − r₂ Each spring applies a Hooke force along its own direction, F(r; k, L) = −k (|r| − L) (r / |r|) and each mass also feels gravity, Fgᵢ = (0, mᵢ g) So the equations of motion are m₁ r̈₁ = Fg₁ + F(r₁; k₁, L₁) − F(r₁₂; k₂, L₂) m₂ r̈₂ = Fg₂ + F(r₁₂; k₂, L₂) − F(r₂₃; k₃, L₃) m₃ r̈₃ = Fg₃ + F(r₂₃; k₃, L₃) We integrate these ODEs forward with RK4 using a small dt. Different scenes come from changing the mass ratios and from giving the third mass a small initial kick. The yellow trail is the path of the third mass. The inset phase portraits show the same motion in state space: (x₃, vₓ₃) and (−y₃, vᵧ₃) When those curves stay tight and loop cleanly, the motion is more regular. When they spread, fold, and smear, energy is being redistributed across the whole chain between gravity, spring stretch, and kinetic motion. #NonlinearDynamics #CoupledOscillators #SpringPendulum #ChaosInMotion #ComputationalPhysics #MathematicalVisualization

Mathelirium

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Pure mechanical poetry. This cutaway of a classic Pratt & Whitney R-985 gives a perfect view inside a 9-cylinder radial aircraft engine. Seeing the pistons fire in a perfect circular sequence to deliver smooth rotary motion through that central crankshaft is highly satisfying. The master rod system handling all that synchronized power is an absolute masterclass in vintage engineering.

Pure mechanical poetry. This cutaway of a classic Pratt & Whitney R-985 gives a perfect view inside a 9-cylinder radial aircraft engine. Seeing the pistons fire in a perfect circular sequence to deliver smooth rotary motion through that central crankshaft is highly satisfying. The master rod system handling all that synchronized power is an absolute masterclass in vintage engineering.

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Drone footage captured the moment three humpback whales worked together in a synchronized bubble-net feeding attack off the coast of Montauk, New York. 🐋 According to NOAA Fisheries, group-coordinated bubble-net feeding is a highly complex, synchronized behavior where humpback whales blow a circular "curtain" of air bubbles to corral and condense schools of small fish or krill. Once the prey is tightly trapped inside the circular net, the whales lunge upward through the center of the ring to feed.

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Physics is often taught in dry equations but Walter Lewin turns it into an edge of your seat thriller. He proves that the laws of nature are not just suggestions they are absolute. By releasing the ball from exactly 2.5 times the radius of the loop (h = 5/2 R) he demonstrates the perfect balance between gravitational potential energy and the kinetic energy required to maintain centripetal force. Watch as the math comes to life and the ball defies gravity through pure conservation of mechanical energy. This is what happens when you stop memorizing formulas and start witnessing the universe in motion.

Physics is often taught in dry equations but Walter Lewin turns it into an edge of your seat thriller. He proves that the laws of nature are not just suggestions they are absolute. By releasing the ball from exactly 2.5 times the radius of the loop (h = 5/2 R) he demonstrates the perfect balance between gravitational potential energy and the kinetic energy required to maintain centripetal force. Watch as the math comes to life and the ball defies gravity through pure conservation of mechanical energy. This is what happens when you stop memorizing formulas and start witnessing the universe in motion.

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Physicist Brian Greene demonstrates gravity in the simplest way possible using a bottle full of water. When the bottle is held still water streams out through the holes because gravity creates pressure inside. But the instant he drops the bottle the leaking stops completely. Bottle and water fall together at the same rate so the water becomes weightless relative to the bottle. It is a perfect demonstration of Einstein’s idea that gravity and acceleration are deeply connected. What feels like weight is often just the result of the frame you are in.

Physicist Brian Greene demonstrates gravity in the simplest way possible using a bottle full of water. When the bottle is held still water streams out through the holes because gravity creates pressure inside. But the instant he drops the bottle the leaking stops completely. Bottle and water fall together at the same rate so the water becomes weightless relative to the bottle. It is a perfect demonstration of Einstein’s idea that gravity and acceleration are deeply connected. What feels like weight is often just the result of the frame you are in.

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"The only way to reach 1,000 terawatts of AI power is with a mass driver on the Moon. Most of the hardware would need to be produced locally on the Moon, and because it has no atmosphere and only one-sixth of Earth's gravity, AI satellites could be launched into deep space using an electromagnetic mass driver instead of rockets." — Elon Musk

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