1001.0785v1.pdf (application/pdf Object) On the Origin of Gravity. Cocktail Party Physics. Physics Study Guide - Wikibooks, collection of open-content textbooks. Xania has nominated himself for use of the Checkuser tools. Please provide your input on this important decision. From Wikibooks, open books for an open world <Cover and interwiki Introduction Section One Units S.I. unitsKinematics Displacement, velocity, accelerationForce Newton's 3 Laws of MotionMomentum Elastic and inelastic collisionsFriction and the Normal ForceWork Force times distanceEnergy The potential to do Work Section Two Section Three FluidsFieldsThermodynamicsElectricity Charge, current, electric fieldsMagnetism Magnetic dipoles, magnetic fieldsElectronics Resistance, voltage, capacitance, inductance (incomplete)Optics Light, lasers etcTheories of Electricity Theories behind Electricity Appendices.
Physics StackExchange. FQXi. FQXb (bio)By WILLIAM OREM • Mar. 23, 2014 @ 21:39 GMT Everyone is talking this week about the dramatic confirmation of inflationary theory: those first-instant gravitational waves whose details may even point--being, if you will, quantum phenomena that went suddenly ultra-macroscopic--toward the correct way to unify QM and GR. I myself have been musing on rather astonishing work in another field. Will you pardon the intrusion if we talk a little bit about biology?
Recently the big news there was released: an unprepossessing experiment involving a weak acid bath showed it's possible to revert mature, differentiated cells to a stem cell state, allowing for the prospect of wholesale repurposing. The surprise wasn't that reversion (or conversion from one mature type into another) can be done--genetics work in that direction took home a Nobel in 2012--but that it can be done so simply. Alas--you knew this part was coming--it is now looking like the champagne may have been premature. 1. 2. 3.
Interactions.org. Fermilab | Home. CERN. PhysOrg.com - Science News, Technology, Physics, Nanotechnology, Space Science, Earth Science, Medicine. Physics Today. Not Even Wrong. I’ve just replaced the old version of my draft “spacetime is right-handed” paper (discussed here) with a new, hopefully improved version. If it is improved, thanks are due to a couple people who sent helpful comments on the older version, sometimes making clear that I wasn’t getting across at all the main idea. To further clarify what I’m claiming, here I’ll try and write out an informal explanation of what I see as the relevant fundamental issues about four-dimensional geometry, which appear even for $\mathbf R^4$, before one starts thinking about manifolds.
Spinors, twistors and complex spacetime In complex spacetime $\mathbf C^4$ the story of spinors and twistors is quite simple and straightforward. While spinors are the irreducible objects for understanding complex four-dimensional rotations, twistors are the irreducible objects for understanding complex four-dimensional conformal transformations. Real forms In this case the conjugation acts in a subtle manner. Some philosophy.