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Taking a closer look at “big G” - Physics World
WEBDec 18, 1998 · Taking a closer look at “big G”. 18 Dec 1998. Of all the fundamental constants in physics, the gravitational constant, "big G", is the least well known. Now a team of physicists from the National Institute of Standards and Technology and the University of Colorado in the US have made the most accurate measurement of G ever.
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 ...
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.
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.
1905: Einstein's paper revolution – Physics World
WEBOct 1, 1998 · 1905: Einstein’s paper revolution. 01 Oct 1998. Einstein's Miraculous Year: Five Papers That Changed the Face of Physics. (ed) John Stachel. 1998 Princeton University Press 198pp £14.95/$19.95hb. Outside it is a warm May evening, as two friends sit deep in discussion in a coffee house in Berne. “Besso, you must help me, I …
Superconductivity appears in nickelate crystals under pressure
WEBAug 15, 2024 · In the latest work, researchers led by Jun Zhao say that they have found evidence for superconductivity in a nickelate with the chemical formula La 4 Ni 3 O 10−δ (where δ can range from 0 to 0.04). Zhao and colleagues obtained this result by placing crystals of the material into a diamond anvil cell, which is a device that can generate extreme pressures of more than 400 GPa (or 4 x 10 6 ...
The legend of the leaning tower – Physics World
WEBFeb 4, 2003 · Mr Galileo was correct in his findings.”. How the legend started. The finding mentioned by Commander Scott, namely that objects of different mass fall at the same rate in a vacuum, is associated with a single person (Galileo) and a single place the Leaning Tower of Pisa. The culprit is Vincenzio Viviani, Galileo’s secretary in the final ...
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 ...
Measuring up: how our search for the speed of light led to our …
WEBJun 26, 2021 · Spence shows how our knowledge of light was filled in piece by piece as astronomers and physicists worked through observational clues like the transit of Venus, where geometry allows an estimate of the Earth–Sun distance to be made.(Hilarity ensues as British and French ships fan across the world to measure – …