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Twists, turns, thrills and spills: the physics of rollercoasters
Aug 14, 2021 · A unit that might make purists wince, the G-force is the difference between the acceleration, a, that you experience as a rider and the acceleration due to gravity, g, (9.8 m/s 2) divided by g and expressed per unit mass: (a–g)/g.This force comes into play thanks to the movement you undergo on the ride– you experience a “positive” G-force when the train is at the bottom of a hill, and ...
Graphene at 20: why the ‘wonder material’ is finally coming good ...
Apr 30, 2024 · The report estimates that the graphene market was worth about $100m in 2022 and is rising at a compound annual growth rate of 20–30%. The biggest potential applications, the authors reckon, lie in graphene electronics, where the market could be worth up to $1bn in the next few years. Growth rates of up to 40% are predicted – and potentially ...
Paul Dirac: the purest soul in physics – Physics World
Feb 1, 1998 · Paul Dirac: the purest soul in physics. 01 Feb 1998. Paul Dirac published the first of his papers on “The Quantum Theory of the Electron” seventy years ago this month. The Dirac equation, derived in those papers, is one of the most important equations in physics, says Michael Berry. Genius at work.
The physics of blood spatter – Physics World
17 Oct 2019. Taken from the October 2019 issue of Physics World. Analysing the blood stains following a shooting can be key to finding the perpetrator, but it’s a field of forensics that is being called into question. Sidney Perkowitz explains how understanding the physics behind the blood distribution could help uncover the truth.
Knowledge grows step-by-step despite the exponential growth of …
Sep 27, 2024 · Defining knowledge is complex, but it can be thought of as a network of interconnected beliefs and information. To measure it, the authors previously created a knowledge quantification index (KQI). This tool uses various scientific impact metrics to examine the network structures created by publications and their citations and quantifies how well publications reduce the uncertainty of the ...
Lithium-ion batteries break energy density record - Physics World
Apr 21, 2023 · Lithium-ion batteries recharge in the cold. The researchers, who report their work in Chinese Physics Letters, explain that a trade-off always exists between the energy density, cycle performance, rate capability and safety of lithium-ion batteries.Safety is a primary requirement, but elevated energy density will increase the risks during battery operation, they say.
John Hopfield and Geoffrey Hinton share the 2024 Nobel Prize for ...
Oct 8, 2024 · John Hopfield and Geoffrey Hinton share the 2024 Nobel Prize for Physics for their “foundational discoveries and inventions that enable machine learning and artificial neural networks”. Known to some as the “godfather of artificial intelligence (AI)”, Hinton, 76, is currently based at the University of Toronto in Canada.
16 key skills and attributes for a successful career in physics
Oct 4, 2022 · A degree in physics. Some experience of working with lasers or optics in an undergraduate laboratory setting would be advantageous. Experience conducting empirical scientific research and drawing sound conclusions. Ability to plan and manage the delivery of own work. Ability to work as part of a team with a range of stakeholders.
James Clerk Maxwell: a force for physics – Physics World
Dec 1, 2006 · Born 175 years ago, James Clerk Maxwell carried out the first profound unification of nature’s forces. Francis Everitt examines the immense contributions of the greatest mathematical physicist since Newton. Deserving recognition. Unless one is a poet, a war hero or a rock star, it is a mistake to die young. James Clerk Maxwell – unlike ...