Twists, turns, thrills and spills: the physics of rollercoasters
WEBAug 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 ...
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The double-slit experiment – Physics World
WEBSep 1, 2002 · This article is an extended version of the article “The double-slit experiment” that appeared in the September 2002 issue of Physics World (p15). It has been further extended to include three letters about the history of the double-slit experiment with single electrons that were published in the May 2003 issue of the magazine.
Graphene at 20: why the ‘wonder material’ is finally coming good
WEBApr 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 – …
The physics of blood spatter – Physics World
WEBTaken 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.
Lithium-ion batteries break energy density record - Physics World
WEBApr 21, 2023 · Technology advances: the energy density of lithium-ion batteries has increased from 80 Wh/kg to around 300 Wh/kg since the beginning of the 1990s. (Courtesy: B Wang) Researchers have succeeded in making rechargeable pouch-type lithium batteries with a record-breaking energy density of over 700 Wh/kg. The new design comprises a high-capacity ...
Brilliant polymath, troubled person: how John von Neumann …
WEBDec 18, 2021 · A relative journey. Hence von Neumann’s emotional commitment to the atomic and hydrogen bombs and America’s Cold War against the Soviet Union – not to speak of his immunity to McCarthyite witch-hunts of Communist sympathizers. Einstein, by contrast, famously never felt at home in America, had little taste for money and deliberately avoided society in Princeton, including von Neumann’s ...
James Clerk Maxwell: a force for physics – Physics World
WEBDec 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 ...
Stephen Hawking’s scientific legacy – Physics World
WEBMay 1, 2018 · Congratulations to Seth Lloyd, whose article “Stephen Hawking’s scientific legacy“ has been picked as one of Physics World‘s five favourite features of 2018.The article is taken from the May 2018 issue of Physics World.. The late Stephen Hawking is an icon of modern physics. As well as inspiring generations of scientists, his contributions have changed our understanding of the universe.
In praise of Lord Kelvin - Physics World
WEB17 Dec 2007. Lord Kelvin — who died 100 years ago today — was a successful inventor, a wealthy businessman and perhaps the most important physicist of the 19th century. David Saxon explains how Kelvin played key roles in everything from thermodynamics and electric lighting to transatlantic telecommunication and the age of the Sun.