Nuclear Weapons - basic technology concepts [UNC]

Nuclear Weapons - basic technology concepts [UNC]

A few words about nuclear weapons technology.. Fission weapons Nuclear weapons exploit two principle physical, or more specifically nuclear, properties of certain substances: fission and fusion. Fission is possible in a number of heavy elements, but in weapons it is principally confined to what is termed slow neutron fission in just two particular isotopes: 235U and 239Pu. These are termed fissile, and are the source of energy in atomic weapons. An explosive chain reaction can be started with relatively slight energy input (so-called slow neutrons) in such material. An actual 239Pu ingot, alloyed with gallium for improved physical properties Isotopes are 'varieties' of an element which differ only in their number of neutrons.
The Size of Our World
Physics 20b: Introduction to Cosmology - Spring 2010 - Download free content from UC Irvine on iTunes

Physics 20b: Introduction to Cosmology - Spring 2010 - Download free content from UC Irvine on iTunes

Description Overview of modern scientific cosmology, including discussion of stars, the Milky Way galaxy, black holes, dark matter, the big bang, and evidence for our current understanding of the universe. Customer Reviews Great content, but audio is seriously lacking by AngryFanOfBirds Great content and the professor is very good at giving real-world analogies which are easy to comprehend.
Relativity Tutorial Relativity Tutorial Galilean Relativity Relativity can be described using space-time diagrams. Contrary to popular opinion, Einstein did not invent relativity. Galileo preceded him. Aristotle had proposed that moving objects (on the Earth) had a natural tendency to slow down and stop.
university lectures physics

university lectures physics

Whether your goal is to earn a promotion, graduate at the top of your class, or just accelerate your life. Lectures can help get you there. Our archives of lectures cover a huge range of topics and have all been handpicked and carefully designed by experienced instructors throughout the world who are dedicated to helping you take the next step toward meeting your career goals. With OnlineCourses.com's engaging collection of lectures, your free time will turn into self-improvement time.

Physics I: Classical Mechanics - Download free content from MIT on iTunes

Description 8.01 is a first-semester freshman physics class in Newtonian Mechanics, Fluid Mechanics, and Kinetic Gas Theory. In addition to the basic concepts of Newtonian Mechanics, Fluid Mechanics, and Kinetic Gas Theory, a variety of interesting topics are covered in this course: Binary Stars, Neutron Stars, Black Holes, Resonance Phenomena, Musical Instruments, Stellar Collapse, Supernovae, Astronomical observations from very high flying balloons (lecture 35), and you will be allowed a peek into the intriguing Quantum World. Customer Reviews Physics as elucidated by Prof Walter Lewin Physics I: Classical Mechanics - Download free content from MIT on iTunes
First published Mon Aug 13, 2001; substantive revision Thu Aug 26, 2010 Quantum entanglement is a physical resource, like energy, associated with the peculiar nonclassical correlations that are possible between separated quantum systems. Entanglement can be measured, transformed, and purified. A pair of quantum systems in an entangled state can be used as a quantum information channel to perform computational and cryptographic tasks that are impossible for classical systems. The general study of the information-processing capabilities of quantum systems is the subject of quantum information theory. 1.

Quantum Entanglement and Information

Quantum Entanglement and Information
Quantum Physics made simple

Quantum Physics made simple

Three Lectures by Hans Bethe IN 1999, legendary theoretical physicist Hans Bethe delivered three lectures on quantum theory to his neighbors at the Kendal of Ithaca retirement community (near Cornell University). Given by Professor Bethe at age 93, the lectures are presented here as streaming videos synchronized with slides of his talking points and archival material. Intended for an audience of Professor Bethe's neighbors at Kendal, the lectures hold appeal for experts and non-experts alike.
Physics/Time

Open Course : Astronomy : Introduction : Lecture 1 : Science of Astronomy