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WEBAre 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 takes longer. Don't forget to check your spam folder.
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 ...
How massive stars form – Physics World
WEB15 Jan 2009. Growing and growing. Astronomers have struggled to understand how the largest stars — up to 120 times as massive as the Sun — can form by sucking in nearby matter. The problem is that, once a star reaches about 20 solar masses, the outward force of its intense radiation exceeds the gravitational force that pulls in matter.
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.
Bose-Einstein condensation – Physics World
WEBMar 1, 1997 · Bose-Einstein condensation is an exotic quantum phenomenon that was observed in dilute atomic gases for the first time in 1995, and is now the subject of intense theoretical and experimental study. Figure 1 The set-up for evaporative cooling from the cloverleaf magnetic trap at MIT. The central (curvature) …
Syukuro Manabe, Klaus Hasselmann and Giorgio Parisi win the …
WEBOct 5, 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 takes longer. Don't forget to check your spam folder.
Gravity’s effect on time confirmed – Physics World
WEBFeb 17, 2010 · Gravity’s effect on time confirmed. Physicists in the US and Germany have used two fundamental tenets of quantum mechanics to perform a high-precision test of Einstein’s general theory of relativity. The researchers exploited wave-particle duality and superposition within an atom interferometer to prove that an effect known as gravitational ...
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 ...
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.