# Articles on "Electricity"

Why three prongs?Why do wall outlets have three holes? "Grounding" and safety. Right Angle CircuitryDo Lenz' Law and the Right Hand rule still work... after you've been turned INSIDE OUT by that greasy black Fog? "Static Electric" misconceptionsA list of things which gave me a warped view of Electrostatics. Speed of "Electricity"? Triboelectric Series If a cat gets trapped in a clothes dryer full of nylon pantyhose, which way do the electrons flow? Where does EM energy flow in a circuit? How Scientists Define the word "Electricity" Quotes from J.C. Barriers to Understanding ElectricityTwenty misconceptions which prevented me from understanding simple electrical science as a student. "Static" Electricity is really just high voltage.Scuff on the rug, then measure your body voltage. Electricity mistakes and 'nitpicking' also How SHOULD we teach Electricity? "Static" sparks Doorknob sparks and zapping yourself on the car door... and people who suffer from an "electric shock" disease.

Dimensions Home A film for a wide audience! Nine chapters, two hours of maths, that take you gradually up to the fourth dimension. Mathematical vertigo guaranteed! Background information on every chapter: see "Details". Click on the image on the left to watch the trailer ! Free download and you can watch the films online! The film can also be ordered as a DVD. This film is being distributed under a Creative Commons license. Now with even more languages for the commentary and subtitles: Commentary in Arabic, English, French, German, Italian, Japanese, Spanish and Russian. Film produced by: Jos Leys (Graphics and animations) Étienne Ghys (Scenario and mathematics) Aurélien Alvarez (Realisation and post-production)

Disappearing Glass Rods: Reflection, Refraction & Light Science Activity Disappearing Glass Rods You can make glass objects disappear. Glass objects are visible because they reflect some of the light that shines on them and bend or refract the light that shines through them. Wesson™ oil. (1 minute or less) Pour some Wesson™ oil into the beaker. (15 minutes or more) Immerse a glass object in the oil. Experiment with a variety of glass objects, such as clear marbles, lenses, and odd glassware. You can make an eyedropper vanish before your eyes by immersing it and then sucking oil up into the dropper. Immerse the magnifying lens in the oil. When light traveling through air encounters a glass surface at an angle, some of the light reflects. When light passes from air into glass, it slows down. The smaller the difference in speed between two clear materials, the less reflection will occur at the boundary and the less refraction will occur for the transmitted light. Wesson™ oil has nearly the same index of refraction (n) as Pyrex® glass (n = 1.474).

Newton Rocket Car Summary The purpose of this activity is to demonstrate Newton's third law of motion — which states that every action has an equal and opposite reaction — through a small wooden car. The Newton cars show how action/reaction works and how the mass of a moving object affects the acceleration and force of the system. Engineering Connection Engineers will often build a model to demonstrate and study a law of science. Educational Standards Each TeachEngineering lesson or activity is correlated to one or more K-12 science, technology, engineering or math (STEM) educational standards. All 100,000+ K-12 STEM standards covered in TeachEngineering are collected, maintained and packaged by the Achievement Standard Network (ASN), a project of JES & Co. In the ASN, standards are hierarchically structured: first by source; e.g., by state; within source by type; e.g., science or mathematics; within type by subtype, then by grade, etc. Pre-Req Knowledge Learning Objectives Materials List Each group needs:

IoHT :: 110+ Variations of the Second Law of Thermodynamics Questions about these second law variations? Know of other second law definitions? Copyright © Institute of Human Thermodynamics and IoHT Publishing Ltd. All Rights Reserved [1] Hippocrates (c. 440 BC). NEED SOURCE [email me if you have it] [2] Lavoisier, A. (1789). [3-4] Carnot, S. (1824). [5-8] Clausius, R. (1850). [9] Kelvin, L. (1852). [10] Kelvin, L. (1852). [11] Kelvin, L. (1852). [12] Kelvin, L. (1852). [13] Kelvin, L. (1852). the Philosophical Magazine, October, 1852; also Mathematical and Physical Papers, vol. i, art. 59. [14] Clausius, R. (1865). [15] Kelvin & Planck. (1879). [16-17] Planck. [18] Caratheodory, C. (1908). [19-21] Fermi, E. (1936). [22-23] Bridgman, P. (1941). [24] Keenan, J. (1941). [25-26] Klotz. [27] Fritz, A. (1959). [28] King, A. (1962). [29-30] Lee, J. & Sears, F. (1963). [31-32] Bazarov, I. (1964). [33] Bent, H. (1965). [34] Hatsopoulos, G. & Keenan, J. (1965). [35-37] Kern, R. & Weisbrod, A. (1967). [38] Battino, R. & Wood, S. (1968). [58] Ebbing (1990). 1.

Optics For Kids - The Optical Society: Exploring the Science of Light Remote controls for devices like televisions, cable boxes, and DVD players typically operate in the infrared. On the front of the remote is a light emitting diode (LED) that produces light in the infrared region. The light flashes quickly to produce a sequenced pattern, which the device being controlled then reads and interprets as a command. Required Materials TV/cable/DVD remote control Webcam or camera phone Activity Directions Point a cheap CCD camera (camera phone or webcam) at the LED on the front of the remote control and view the image on the phone/computer. Here's What's Happening Digital cameras are typically made from silicon CCD’s, which can detect light from the visible out to the near end of the infrared.

NAROM -Praktiske aktiviteter NAROM har et bredt spekter av spennende praktiske lab-øvelser som tilbys ved ulike kurs og aktiviteter. I mange av øvelsene blir den unike infrastrukturen ved Andøya Space Center benyttet slik at kursdeltakerne får sjansen til å gjennomføre øvelser som ikke ville vært mulig å gjennomføre ved lærestedet de kommer fra. Her kommer en oversikt over noen av NAROMs mest sentrale øvelser. Rakettverksted Det er tre forskjellige slags raketter som kan bygges i rakettverkstedet: modellrakett, papirrakett og vannrakett. NAROM velger av disse alt etter behov i det respektive kurset. Det er standard at høyde og avstand av rakettskuddene måles. ModellrakettRakettene lages av byggesett og brukes sammen med svartkkruttmotor (papirraketter og vannraketter bruker overtrykk). Last ned øvelsen: Papirrakettøvelse med mal (pdf)Last ned byggeinstruksjoner for rampe: Utskytningsrampe mal (pdf) VannrakettVannrakett er en av de enkleste måtene å bygge en rakett på. Last ned øvelsen: Vannrakettøvelse (pdf)

Special Relativity Special Relativity These pages are ok as far as they go, but they are missing the planned highlight, to show you what things actually look like when you travel at near the speed of light. I hope to have the opportunity to develop these pages further as time permits. Meanwhile, these pages comprise an animated introduction to the elements of Special Relativity. And don't miss Prasenjit Saha's Interactive Lorentz Transformations. © 1998, 1999 Andrew Hamilton. Forward to The Postulates of Special Relativity Hey, get me back to Falling into a Black Hole Unless otherwise stated, clicking on images gives you enlarged versions thereof, which may be easier to view in a classroom environment. Special Relativity: Index Andrew Hamilton's Homepage Other Relativity and Black Hole links

Can you make a rainbow disappear? What you need: A colour print out of the colour wheel above Glue Cardboard Scissors Pencil How you do it: Print out the colour wheel above. Glue the colour wheel to a sheet of cardboard. Once the glue is dry, pierce the the middle of the colour wheel with scissors (ask a parent or guardian for help here). Insert a pencil through the hole until the colour wheel is about a third of the way along the pencil. Spin the disc and watch what happens... Did you see the colours merge into white? Watch this video to see a different Newton's disc being made: Or go to YouTube. Thanks to Planet Scicast for pointing us in the direction of the brilliant Arvind Gupta.

High-Pressure Foam Rocket | Make: electronics, crafts, DIY projects and how-tos for makers Step #4: Use it! PrevNext Pressurize the compressed air launcher for 45psi–65psi, and launch. (For a lower pressure/altitude launch, use a stomp launcher.) When the duct tape finally fails with a spectacular blowout, just apply more duct tape over the blown section and keep flying! Usenet Physics FAQ Version Date: March 2013 This list of answers to frequently asked questions in physics was created by Scott Chase in 1992. Its purpose was to provide good answers to questions that had been discussed often in the sci.physics and related Internet news groups. The articles in this FAQ are based on those discussions and on information from good reference sources. Most of the entries that you'll find here were written in the days when the Internet was brand new. So because of their age, the FAQ entries that you'll find here have a great deal of academic credibility—but they are not always perfect and complete. This document is copyright. General Physics Particle and Nuclear Physics Quantum Physics Relativity and Cosmology Speed of Light Special Relativity General Relativity and Cosmology Black Holes Reference Topics There are many other places where you may find answers to your question. This FAQ is currently available from these web sites: Australia:

Fascinating Friction! Summary Students use wood, wax paper and oil to investigate the importance of lubrication between materials and to understand the concept of friction. Using wax paper and oil placed between pieces of wood, the function of lubricants between materials is illustrated. Students extend their understanding of friction to bones and joints in the skeletal system and become aware of what engineers can do to help reduce friction in the human body as well as in machines. Engineering Connection Many machines that engineers design use joints similar to the ones found in our bodies. Educational Standards Each TeachEngineering lesson or activity is correlated to one or more K-12 science, technology, engineering or math (STEM) educational standards. All 100,000+ K-12 STEM standards covered in TeachEngineering are collected, maintained and packaged by the Achievement Standard Network (ASN), a project of JES & Co. Click on the standard groupings to explore this hierarchy as it applies to this document. U.S.

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