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 · As such a great conductor and being 200 times stronger than steel, it’s obvious why there was so much excitement about graphene. But for anyone familiar with the “Gartner hype cycle”, it’s no surprise that graphene’s early promise was soon followed by a “trough of disillusionment” as people lost interest and enthusiasm.However, as the Gartner cycle so wonderfully predicts of any ...
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Stephen Hawking’s scientific legacy – Physics World
May 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 …
The physics of blood spatter – Physics World
Oct 17, 2019 · Joe Bryan, once a popular and respected high-school principal in a small Texas town, has been in prison for over 30 years. He is serving a 99-year sentence for the shooting and murder of his wife in 1985. The evidence incriminating him involved spots of the victim’s blood found on a hand-held torch.
The Turing Test 2.0 – Physics World
May 8, 2021 · Are you an IOP member? Create a Physics World account to get access to all available digital issues of the monthly magazine. Your Physics World account is separate to any IOP accounts you may have.. Note: The verification e-mail to complete your account registration should arrive immediately. However, in some cases it …
When cold warms faster than hot – Physics World
Dec 1, 2017 · Granular effects (Courtesy: iStock/schmidt-z) Oren Raz and Zhiyue Lu’s model of the Mpemba effect has already inspired Antonio Lasanta, Andrés Santos and Francisco Vega Reyes from the Universidad de Extremadura in Spain, along with Antonio Prados from Universidad de Sevilla, to devise their own theoretical model showing a Mpemba effect in a granular fluid, consisting of spherical particles ...
Brilliant polymath, troubled person: how John von Neumann …
Dec 18, 2021 · Visionary thinker John von Neumann (right) received the Medal of Freedom from President Dwight Eisenhower in 1956. (Courtesy: Byron Rollins/ AP/ Shutterstock) Few mathematicians during the last century – perhaps only Bertrand Russell and Alan Turing – were as successfully polymathic as John von Neumann, the subject of the biography The Man from the Future: the Visionary Life of John von ...
Nuclear-powered spacecraft: why dreams of atomic rockets are …
Feb 1, 2024 · Going nuclear America’s DRACO rocket will use the heat from a fission reactor to propel it into space. (Courtesy: Lockheed Martin) In 1914 H G Wells published The World Set Free, a novel based on the notion that radium might one day power spaceships.Wells, who was familiar with the work of physicists such as Ernest Rutherford, knew that radium could produce heat and envisaged it being used ...
Max Planck: the reluctant revolutionary – Physics World
Dec 1, 2000 · Quantum uncertainty Max Planck is widely credited for being the first person to realize that the energy of a body is “quantized”, but history shows that this is probably not what he had in mind at the time. Indeed, the “discovery” of quantum theory should not be seen as a moment of insight in December 1900, but as an extended process by many physicists.