Solar Panels, Roof Tiles, Photovoltaic Systems | Home, Business & Utility-Scale Solutions | SunPower How did the solar system form? The solar system is a pretty busy place. It’s got all kinds of planets, moons, asteroids, and comets zipping around our Sun. But how did this busy stellar neighborhood come to be? Our story starts about 4.6 billion years ago, with a wispy cloud of stellar dust. This cloud was part of a bigger cloud called a nebula. At some point, the cloud collapsed—possibly because the shockwave of a nearby exploding star caused it to compress. When it collapsed, it fell in on itself, creating a disk of material surrounding it. Finally the pressure caused by the material was so great that hydrogen atoms began to fuse into helium, releasing a tremendous amount of energy. Even though the Sun gobbled up more than 99% of all the stuff in this disk, there was still some material left over. Bits of this material clumped together because of gravity. Rocky planets, like Earth, formed near the Sun, because icy and gaseous material couldn’t survive close to all that heat.
Could High-Dive Jumpers Leap Over This Whole Pool? This is an older video from the World Championship in Dødsing. That’s about all I know except that it’s in Oslo, Norway. Watching this shows several very entertaining jumps. There are also a few jumps that look a little too close to the far edge of the pool. So, is it possible to run and jump from the high dive and hit the far end of the pool? Gathering Information After looking around on Google Maps, I found the location of the high dive. That’s about 16 meters from the end of the platform. Projectile Motion Yes, there is some guy jumping off a platform — in physics we would call this projectile motion even though he isn’t being “launched” like you might think. Since the only force is in the vertical direction, I can write the following two force equations. The acceleration in the horizontal (x-direction) would be zero and the acceleration in the vertical direction would be -g (or -9.8 m/s2). Since the x-velocity is constant, we can write the following: For the y-motion, we can write: Ok.
Planets For Kids - Solar System Facts and Astronomy Motion Mountain - The Free Physics Textbook for Dowload Astronomy Picture of the Day The Large Hadron Collider The Large Hadron Collider (LHC) is the world’s largest and most powerful particle accelerator. It first started up on 10 September 2008, and remains the latest addition to CERN’s accelerator complex. The LHC consists of a 27-kilometre ring of superconducting magnets with a number of accelerating structures to boost the energy of the particles along the way. Inside the accelerator, two high-energy particle beams travel at close to the speed of light before they are made to collide. The beams travel in opposite directions in separate beam pipes – two tubes kept at ultrahigh vacuum. Thousands of magnets of different varieties and sizes are used to direct the beams around the accelerator. All the controls for the accelerator, its services and technical infrastructure are housed under one roof at the CERN Control Centre. How many kilometres of cables are there on the LHC? Download the LHC guide [PDF] CERN takes safety very seriously. Read about the safety of the LHC
Einstein for Everyone Einstein for Everyone Nullarbor Press 2007revisions 2008, 2010, 2011, 2012, 2013 Copyright 2007, 2008, 2010, 2011, 2012, 2013 John D. Norton Published by Nullarbor Press, 500 Fifth Avenue, Pittsburgh, Pennsylvania 15260 with offices in Liberty Ave., Pittsburgh, Pennsylvania, 15222 All Rights Reserved John D. An advanced sequel is planned in this series:Einstein for Almost Everyone 2 4 6 8 9 7 5 3 1 ePrinted in the United States of America no trees were harmed web*bookTM This book is a continuing work in progress. January 1, 2015. Preface For over a decade I have taught an introductory, undergraduate class, "Einstein for Everyone," at the University of Pittsburgh to anyone interested enough to walk through door. With each new offering of the course, I had the chance to find out what content worked and which of my ever so clever pedagogical inventions were failures. At the same time, my lecture notes have evolved. This text owes a lot to many. i i i
Physics Flash Animations We have been increasingly using Flash animations for illustrating Physics content. This page provides access to those animations which may be of general interest. The animations will appear in a separate window. The animations are sorted by category, and the file size of each animation is included in the listing. Also included is the minimum version of the Flash player that is required; the player is available free from The categories are: In addition, I have prepared a small tutorial in using Flash to do Physics animations. LInks to versions of these animations in other languages, other links, and license information appear towards the bottom of this page. The Animations There are 99 animations listed below. Other Languages and Links These animations have been translated into Catalan, Spanish and Basque: En aquest enllaç podeu trobar la versió al català de les animacions Flash de Física.
Physics Flash Animations We have been increasingly using Flash animations for illustrating Physics content. This page provides access to those animations which may be of general interest. The animations will appear in a separate window. The animations are sorted by category, and the file size of each animation is included in the listing. In addition, I have prepared a small tutorial in using Flash to do Physics animations. LInks to versions of these animations in other languages, other links, and license information appear towards the bottom of this page. The Animations There are 99 animations listed below. Other Languages and Links These animations have been translated into Catalan, Spanish and Basque: En aquest enllaç podeu trobar la versió al català de les animacions Flash de Física. Many animations have been translated into Greek by Vangelis Koltsakis. Most animations have been translated into Hungarian by Sandor Nagy, Eötvös Loránd University.
Physics To Go: Explore Physics on your own image credit: U.S. Air Force; image source; larger image Newton's 3rd Law What is the purpose of the small rotor on the back of this helicopter? This reaction force creates a torque that, by itself, would make the helicopter spin in the opposite direction as the rotor. (This feature was updated on September 22, 2013.) Torque Check out this PBS video to use the concept of torque to explain how one dancer can balance on top of the head of another--and on point!