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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 ...
What is time? - Physics World
WEBWhat is time? 24 Oct 2013. Taken from the 25th anniversary issue of Physics World, this article examines one of the five biggest unanswered questions in physics as selected by the magazine’s editors. Scientists and philosophers have been debating the nature of time for centuries, and despite some progress, Adam Frank believes that this is one ...
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.
Brilliant polymath, troubled person: how John von Neumann …
WEBDec 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 ...
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.
The Casimir effect: a force from nothing – Physics World
WEBSep 1, 2002 · The Casimir force is the most famous mechanical effect of vacuum fluctuations. Consider the gap between two plane mirrors as a cavity (figure 1). All electromagnetic fields have a characteristic “spectrum” containing many different frequencies. In a free vacuum all of the frequencies are of equal importance.
Latest - Physics World
WEBSent once every two months, the newsletter will bring all the latest optics research updates, industry news and feature articles straight to your inbox. To register simply sign in to your account and tick the “Optics – bimonthly” box. Physics World represents a key part of IOP Publishing's mission to communicate world-class research and ...
Fundamentals of quantum information – Physics World
WEBMar 1, 1998 · All that is defined is the fact that the two qubits are different. This means that all of the information is distributed among two qubits, and that none of the individual systems carries any information. This is the essence of entanglement and is one of the novel and counterintuitive features of quantum mechanics.
Do atoms going through a double slit ‘know’ if they are being …
WEBMay 26, 2015 · In the famous double-slit experiment, single particles, such as photons, pass one at a time through a screen containing two slits. If either path is monitored, a photon seemingly passes through one slit or the other, and no interference will be seen. Conversely, if neither is checked, a photon will appear to have passed through both slits ...
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