Reference Terms
from Wikipedia, the free encyclopedia
Friction
Friction is the force that opposes the relative motion or tendency of such motion of two surfaces in contact.
Note: The above text is excerpted from the Wikipedia article "Friction", which has been released under the GNU Free Documentation License.
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Matter & Energy News
April 18, 2025
Apr. 11, 2025 — A team of researchers reported the first direct observation of a surprising quantum phenomenon predicted over half a century ago known as a superradiant phase transition, which occurs when two groups of quantum particles begin to fluctuate in a ...
Apr. 9, 2025 — A hopping, insect-sized robot can jump over gaps or obstacles, traverse rough, slippery, or slanted surfaces, and perform aerial acrobatic maneuvers, while using a fraction of the energy required for flying ...
Apr. 7, 2025 — A web platform uses a chatbot to enable any chemist -- including undergraduate chemistry majors -- to configure and execute complex quantum mechanical simulations through ...
Apr. 2, 2025 — Smaller than a grain of rice, new pacemaker is particularly suited to the small, fragile hearts of newborn babies with congenital heart defects. Tiny pacemaker is paired with a small, soft, flexible wearable patch that sits on the patient's chest. ...
Latest Headlines
updated 12:56 pm ET
Apr. 17, 2025 — An international team of physicists has made a significant observation of the BKT phase transition in a 2D dipolar gas of ultracold atoms. This ...
Apr. 17, 2025 — An international team has succeeded in producing new, efficient thermoelectric materials that could compete with state-of-the-art materials, offering greater stability and lower ...
Apr. 17, 2025 — Conventional thinking holds that the metal site in single atom catalysts (SACs) has been a limiting factor to the continued improvement of the design ...
Apr. 17, 2025 — Clathrates are characterized by a complex cage structure that provides space for guest ions too. Now a team has investigated the suitability of ...
Apr. 17, 2025 — A study has found a rare form of one-dimensional quantum magnetism in a metallic compound, offering evidence into a phase space that has remained, ...
Apr. 17, 2025 — Scientists have demonstrated a sort of holographic strip that splits a single laser beam into five bespoke beams that create an optical knot. The work shows that optical knots could be used as a ...
Apr. 17, 2025 — Scientists have created the first neutron 'Airy beam,' which has unusual capabilities that ordinary neutron beams do not. The achievement could enhance neutron-based techniques for investigating the ...
Apr. 18, 2025 — A new smart insole system that monitors how people walk in real time could help users improve posture and provide early warnings for conditions from plantar fasciitis to Parkinson's ...
Apr. 16, 2025 — Imagine tiny building toy pieces that automatically snap together to form a strong, flat sheet. Then, scientists add special chemical 'hooks' to these sheets to attach glowing molecules called ...
Apr. 16, 2025 — Crime scene investigation may soon become significantly more accurate and efficient thanks to a new method for detecting gunshot residues. ...