This is a simple magnetic bound-state setup based on... a ⌀4 mm micromotor running at 33,000 rpm, in which a small magnet weighing ~80 mg is held horizontally in the air. In experiments so far, the smallest magnet has been ~5 mg, at a motor speed of 105K rpm.show more

Faraday's Law of Induction ✍️ It describes the phenomenon... of how a changing magnetic field around a wire can "force" electricity along its length. As the magnet is moved up and down through the wire coil, the magnetic flux (the number of lines of force) is constantly changing. This constant change leads to an electromotive force (EMF), which behaves like a battery, providing the necessary power for electrons to flow and generate electrical current. The video demonstrates that electricity is not produced simply by placing a magnet near the wire but rather by moving the magnet. The rate at which the magnet is moved dictates how much electricity is created. Nevertheless, as seen from the chart, the movement of electricity ceases completely when the magnet remains stationary, regardless of whether it is inside the coil. Video 📸: py6cjshow more

“The relevance of this video is showing the repulsion... action is all around the rotating magnet and there is also a torque effect which enforces the floating magnet be aligned along the field lines of the rotating magnet.”show more

Shorts keep accumulating at $80-81K $BTC has been getting... rejected at that level for two weeks straight But the bigger the short cluster gets, the more fuel there is for the squeeze $80K is a magnet right now Watch this levelshow more

A bar magnet spinning at angular speed Ω is... a magnetic dipole m turning in its own plane, and it radiates at f = Ω/2π. In that plane E points straight out of it, E ∝ m̈ × r̂ at the retarded time t − r/c, so each far crest lies on θ = φ(t − r/c) + π/2: two spiral arms of pitch λ = 2πc/Ω. The whine is 1024f, ten octaves up. In empty space J = 0, so in ∇ × B = μ₀ε₀ ∂E/∂t + μ₀J only the changing E keeps B alive. The radiated power grows as Ω⁴.show more

A friend of mine in Abuja just imported 2... of this MG by himself just for his family. MG is the cheapest car in Chinashow more

He’s a simple magnetic electrical connection trick. Soldering magnets... is problematic, but if you put the magnet inside a spring and solder the spring, Bob’s your uncle.show more

This is getting f*cking dangerous: when Tesla promised a... $20,000 humanoid, they didn't even realize what chain reaction they were triggering 1. Every humanoid runs on dozens of joints, and every joint needs a precision reducer 2. By Tesla's own numbers Optimus has 28 structural actuators, so 28 reducers per robot 3. The Fremont line is built for 1M robots a year, which means tens of millions of precision gears 4. Strain wave gears at this level come from a handful of factories, mostly in Japan and China 5. Japanese reducers would eat the budget of a $20,000 robot, so whoever makes cheap ones at scale wins 6. That's how a gear factory nobody has heard of becomes more important than the logo on the shell 7. The humanoid race will be decided by whoever controls the metal under the plastic 6,000 RPM in, 20 RPM out, and the money of the whole industry hides in that 300:1show more

A rotating magnetic field creates a bound state where... two levitated dipole spheres orbit like planets. Their poles stay radial and antiparallel, repelling each other while the rotating magnet stack stabilizes the system, pure magnetic orbital dynamics.show more

Magnetic nail art The metallic pigments in these polishes... react to a magnet near the uncured polish, forming captivating effects.show more

'29 Brady Wise (Brady Wise) 6'4 160lbs Projectable frame... & will be a ‘29 to eye in the commonwealth in the coming years. FB: 80-83 (2215 RPM, 21 IVB) CB: 68-69 (2428 RPM) CH: 74-75 (1443 RPM) #KYTPG26 || Prep Baseballshow more

The Mind is a Magnet

When you orient a strong magnet at the base... it forces the plasma to rotate, here it is forming a stable spiral. Next an external magnet is used to manually influence the shape and position of the plasma spiral.show more

Eric Collins on Pelle Larsson: “This guy is a... foul magnet. He gets hit in the face more than anybody in the NBA.” (h/t ペレ)show more

Inertia is the driving reason RC car tires balloon... at high RPM. As the tire spins, every part of the rubber wants to travel in a straight line, but the wheel forces it to move in a circle.🚗🛞show more

Pete Crow-Armstrong's bat speed is up early in 2026.... So far, it's sitting at 76.2 mph, a 3.5 mph increase from 2025 and the largest jump in MLB. It's a small sample, but a trend worth following.show more

This is a bacterial flagellar motor … one of... nature’s most sophisticated molecular machines - a rotary motor embedded in the cell membrane consisting of ~25-30 protein types totaling 20,000-50,000 atoms in a multi-part structure of rotor, stator, drive shaft, and propeller. Operating at 100-300 Hz (6,000-18,000 RPM) with some species reaching 1,700 Hz (~100,000 RPM) at nearly 100% efficiency, this nanoscale engine features rotor proteins FliG/FliM/FliN forming the C-ring, MotA/MotB stator complexes, FlgG rod protein drive shaft, FliC flagellin propeller filament, and FlgE hook proteins acting as a universal joint, all powered by proton or sodium flow across the membrane generating torque through conformational changes in the stator complexes.show more

Officers are trying to speak to a man -... who they think is armed - on the top floor of the block of flats in Sheffield, which is at the centre of a standoff. This has been ongoing for almost 24 hours.show more

Oh boy! Not only a Newman school magnet on... the back of the vehicle but a Country Day magnet as well. That’s $50,000 minimum in school tuition. Add another child to either school and it’s another 25K. Private school is expensive.show more