background preloader

Physics

Facebook Twitter

1.26.2009 - Video: Physics for presidents, future and present.

Astronomy

SUNY: Regents High School Physics Exam Formulas. Multimedia Gallery: Images. Early Black Holes Grew Big Eating Cold, Fast Food-Mellon College of Science. Friday, December 9, 2011 The large scale cosmological mass distribution in the simulation volume of the MassiveBlack.

Early Black Holes Grew Big Eating Cold, Fast Food-Mellon College of Science

The projected gas density over the whole volume ('unwrapped' into 2D) is shown in the large scale (background) image. LivePhysics. Science Friday: How Einstein proved E=mc² Physics of Collective Consciousness. By Attila Grandpierre Attila Grandpierre, Ph.D.

Physics of Collective Consciousness

Konkoly Observatory of the Hungarian Academy of Sciences H-1525 Budapest P. O. Box 67., Hungary February 6, 1996. Gerard ’t Hooft, Theoretical Physics as a Challenge. By Gerard 't Hooft Note: This web site will soon be removed from its present address.

Gerard ’t Hooft, Theoretical Physics as a Challenge

An updated and renewed version is available at: This is a web site for young students - and anyone else - who are (like me) thrilled by the challenges posed by real science, and who are - like me - determined to use their brains to discover new things about the physical world that we are living in. In short, it is for all those who decided to study theoretical physics, in their own time. It so often happens that I receive mail - well-intended but totally useless - by amateur physicists who believe to have solved the world. It should be possible, these days, to collect all knowledge you need from the internet. I can tell you of my own experiences.

Theoretical Physics is like a sky scraper. 'Schrödinger's hat' could spy on quantum particles. An international team of physicists has proposed a new device that could detect the presence of waves or particles while barely disturbing them.

'Schrödinger's hat' could spy on quantum particles

Called a "Schrödinger's hat", the device has not yet been built in the lab but the team believes that it could someday be used as a new type of sensor for quantum-information systems. In the microscopic world of quantum mechanics, direct observation of the property of a particle – the position of an electron, for example – causes the collapse of the particle's wavefunction. The result is that the particle that you set out to measure has been changed in a significant way. In the early 1990s, physicists Avshalom Elitzur and Lev Vaidman at Tel Aviv University in Israel pointed out that it is not always necessary to observe particles directly to learn something of their nature. The researchers imagined a pile of bombs, each of which is designed to be triggered by the absorption of a single photon. Untitled. Physics problems now exist for the following topics: Basic Concepts Mechanics Thermal Physics Electricity and Magnetism (Click on the topic name to go check them out...)

untitled

(note: on some browsers you will need to turn off style sheets or will get "file not found" errors) Symbols, Constants, & Equations Interactive Physics Problem Set Documents Relevant to this Collection: A Sample Problem with Instructions Problem Difficulty Color Code Adding Problems to the Student Page. Super-Kamiokande detector in Japan.

Super-Kamiokande Detector in Japan36°20'24"N, 137°19'48"E..

Super-Kamiokande detector in Japan

A typical neutrino event at Super K Super-Kamiokande Super-Kamiokande, or Super-K for short, is a neutrino observatory in Japan. The observatory was designed to study solar neutrinos, study atmospheric neutrinos, search for proton decay, and detect neutrinos from a supernova anywhere in our galaxy.

Books

Video/Lectures. Lecture 1 - Course Introduction and Newtonian Mechanics. Sites/default/files/holloway_3.jpg sites/default/files/dimock_3.jpg. Astronomy Interactives. This site provides ranking tasks for teaching introductory astronomy.

Astronomy Interactives

Pencil-and-paper versions as well as computer-based versions are available grouped by topic. New materials will be added as the computer-based versions are completed. David Tong: Teaching. Fowler's Physics Applets. Michael Fowler - University of Virginia Physics Link to Ukranian Version Check out our flashlets!

Fowler's Physics Applets

These are a few applets I use to teach classes. My graduate students and I have written all the applets shown below. I collect them here because others may find them useful outside the scope of the lectures I provide on the web. Particle_chart.jpg (JPEG Image, 3000x2275 pixels) - Scaled (31%) All (known) Bodies in the Solar System Larger than 200 Miles in Diameter. HyperPhysics.

8 shocking things we learned from Stephen Hawking's book. From the idea that our universe is one among many, to the revelation that mathematician Pythagoras didn't actually invent the Pythagorean theorem, here are eight shocking things we learned from reading physicist Stephen Hawking's new book, "The Grand Design," written with fellow physicist Leonard Mlodinow of Caltech.

8 shocking things we learned from Stephen Hawking's book

The book, covering major questions about the nature and origin of the universe, was released Sept. 7 by its publisher, Bantam. 1. The past is possibility According to Hawking and Mlodinow, one consequence of the theory of quantum mechanics is that events in the past that were not directly observed did not happen in a definite way. Instead they happened in all possible ways. This is related to the probabilistic nature of matter and energy revealed by quantum mechanics: Unless forced to choose a particular state by direct interference from an outside observation, things will hover in a state of uncertainty. Yeah, we're still trying to wrap our brains around this. 2. 3. 4. 5. Professor of Theoretical Physics, CUNY.

Lesson 281 - Physics (Bracket Week)