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In computer simulations, as an object slides along the surface of ice, a structureless, "amorphous" layer forms. Materials scientists at Saarland University in Germany argue that this process may be the cause of ice’s slipperiness.

Quanta Magazine

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335,485 次观看 • 9 个月前 •via X (Twitter)

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🧊Scientists generally agree that a thin watery layer on the surface of ice is responsible for ice’s slipperiness. But why does this layer form? Is it due to pressure, friction, pre-melting, or something else? Daniel Bonn built a microscopic ice-skating rink to test out his theory.

🧊Scientists generally agree that a thin watery layer on the surface of ice is responsible for ice’s slipperiness. But why does this layer form? Is it due to pressure, friction, pre-melting, or something else? Daniel Bonn built a microscopic ice-skating rink to test out his theory.

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Rochester Cloak is a cloaking device which can be built using inexpensive, everyday materials. John Howell, a professor of physics at the University of Rochester, and graduate student Joseph Choi developed the device, which features four standard lenses that allows an object to appear invisible as the viewer moves several degrees away from the optimal viewing positions.

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We're cold just looking at this video 🥶⁣ This is rime, which forms when tiny, near-freezing water droplets, usually from thick fog and clouds, attach to the surface of a below-freezing object and turn into ice immediately on contact. Rime builds up in the direction of the wind and is more like accumulated freezing dew rather than thick frost.⁣

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🚨 GRAPHENE MAY BE ONE OF THE MOST IMPORTANT MATERIALS EVER DISCOVERED. It’s nearly transparent. Almost weightless. Thinner than paper. Yet stronger than steel. Graphene is made from a single layer of carbon atoms arranged in a perfect hexagonal lattice a structure so precise that electrons can move through it almost like light itself. Why this matters: This material could eventually transform: • batteries • quantum computing • flexible electronics • spacecraft materials • neural interfaces • ultra-fast processors • next-generation energy systems Some scientists believe graphene may help unlock an entirely new era of technology where materials are engineered atom-by-atom for specific realities. The strange part? It’s just carbon. The same element found in pencil lead. Sometimes the biggest revolutions begin with structures hiding in plain sight. Follow for more future physics and technology breakthroughs.

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Gravitational lensing, also known as an Einstein ring This occurs when the strong gravitational pull of a massive object warps spacetime around it so much that light and other forms of electromagnetic radiation are deflected from a straight path. For example, animations show how a black hole passing in front of a galaxy distorts its visible image. An object with such a powerful gravitational pull is called a gravitational lens.

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Gustnado in Trussville earlier when the storm passed through. A gustnado (a blend of the words “gust front” and “tornado”) is a brief, shallow, surface-based whirlwind that forms along the leading edge of a thunderstorm. They are not associated with storm scale rotation, and are classified as thunderstorm wind events. Video from Kayden Russell

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