background preloader

Electricity and Magnetism

Electricity and Magnetism
Related:  physics

Science, Optics and You Online Activities for Students The following activities are provided to help you investigate light, optics, and color. They were written by educators with input from scientists, researchers, students, and teachers. Students, teachers, and parents are encouraged to work together to begin an exploration of concepts that help us learn about how we see our world. Activity 1: Perspectives: Powers of 10 - Scientists look at things using their eyes, but they also use a wide variety of specialized tools that give them extra capabilities. Activity 2: K-W-L: What I Know, What I Want to Know, What I Learned - The K-W-L chart is a way for you to put in writing some of your ideas about lenses. Activity 3: Using Media to Explore Light and Optics - Much of the information that you get comes from the media--newspapers, magazines, radio, and television. Activity 5: Looking Through Lenses - There are many different types of lenses, each with their own characteristics and behaviors. How Does It Work?

museum of science, art and human perception Transformers In the photograph, note that the coil on the left has fewer coils than that at right (the insets show close-ups). The sketch and circuit show a step-up transformer. To make a step-down transformer, one only has to put the source on the right and the load on the left. (Important safety note: for a real transformer, you could only 'plug it in backwards' only after verifying that the voltage rating were appropriate.) The core (shaded) has high magnetic permeability (ie a material that forms a magnetic field much more easily than free space does, due to the orientation of atomic dipoles). Vp = − Np.dφ/dt . VpIp = VsIs, whence Is/Ip = Np/Ns = 1/r. So you don't get something for nothing: if you increase the voltage, you decrease the current by at least the same factor. In some cases, decreasing the current is the aim of the exercise.

ippex online - main The Physics Classroom 7 Man-Made Substances that Laugh in the Face of Physics | Cracke The universe is full of weird substances like liquid metal and whatever preservative keeps Larry King alive. But mankind isn't happy to accept the weirdness of nature when we can create our own abominations of science that, due to the miracle of technology, spit in nature's face and call it retarded. That's why we came up with... #7. What do you get when you suspend nanoparticles of iron compounds in a colloidal solution of water, oil and a surfactant? A ferrofluid is a liquid that reacts to magnetic fields in trippy ways that make you think that science is both magical and potentially evil. Tell us that didn't look like the birth of the most sinister dildo ever. What happens is that when a magnetic field is applied to the fluid, the particles of iron compound inside align to it. What the Hell is it Used For? Ferrofluids have a lot of pretty mundane uses, from lubricating and protecting hard drives to providing heat conduction in speakers, but their primary use is in looking cool. #6. #5.

Circuit Simulator Applet This is an electronic circuit simulator. When the applet starts up you will see an animated schematic of a simple LRC circuit. The green color indicates positive voltage. The gray color indicates ground. A red color indicates negative voltage. To turn a switch on or off, just click on it. The "Circuits" menu contains a lot of sample circuits for you to try. Full Screen version. Directions. Standalone (offline) versions. Index of Circuit Examples. More applets. Javascript version. Report a problem/feature request Huge thanks to Iain Sharp for the Javascript port.

Home | Practical Physics Find out about our education projects and free teaching resources from the links on this page. We also offer opportunities for school and college students to take part in STEM-related research over their summer holidays through our Nuffield Research Placements. Our work in education includes funding research and supporting its translation into policy and practice. Our current focus is in science and mathematics, foundations for learning, and secondary education transitions. In the past, we have worked in other subject areas including D&T, history, and languages, and further information is available on our curriculum projects page.

Physics_For_Entertaiment : Perelman Discover Magazine dark matter Your hands are, roughly speaking, 360 million years old. Before then, they were fins, which your fishy ancestors used to swim through oceans and rivers. Once those fins sprouted digits, they could propel your salamander-like ancestors across dry land. Fast forward 300 million years, and your hands had become fine-tuned for manipulations: your lemur-like ancestors used them to grab leaves and open up fruits. Within the past few million years, your hominin ancestors had fairly human hands, which they used to fashion tools for digging up tubers, butchering carcasses, and laying the groundwork for our global dominance today. We know a fair amount about the transition from fins to hands thanks to the moderately mad obsession of paleontologists, who venture to inhospitable places around the Arctic where the best fossils from that period of our evolution are buried. A team of Spanish scientists has provided us with a glimpse of that story. Both fins and hands get their start in embryos.

Applets Applets Light Reflection Plane Mirror Image Creating an Image with Plane Mirror Mirror and Image Java applet Mirror Game Transformations and Symmetry On this site you will find the electronic Principles and Standards for School Mathematics. Refraction Snell's Law Snell's Law Snell's Shooting Game Prism Applet - Refraction and Dispersion Lens Combination Refraction of Light Prism: Reflection and refraction Prism: Reflection and refraction (java applet) Reflection and Refraction (2) Diffraction Young's Double Slit Double Slit Experiment Single-Slit Diffraction Single Slit Diffraction (2) general physics java applets developed by Surendranath Reddy, a physics teacher from Hyderabad, India. Diffraction Grating When the spacing between lines on a diffraction grating is similar in size to the wavelength of light, an incident collimated and coherent beam will be strongly diffracted upon encountering the grating. Color Primary Color (RGB) Addition CYM Color Mixing Rainbow Shadow/Image and Color Color Filters Color Mixing Math

Physics 121.6 Applets The following is a list of applet collections that you may find useful. In the table above however I have links to a few of the many applets available on the web that I think are most useful in illustrating the concepts of this course. Applets 1 - Graphs of Position and Velocity This Applet shows a cow on roller skates! Note the shape of the position vs. time graph and the velocity verses time graph for each of the following cases. Try different non-zero initial velocities with zero acceleration. This second applet displays much the same thing. Run Applet... Applets 2 - Vector Addition This Shockwave applet shows the addition of two vectors (Red vector + Green vector = Blue vector). Run Applet... Another applet which shows much the same thing in a slightly different way.... Run Applet... Applets 3 - Projectile Motion This Applet shows the path of a cannonball fired into the air over a horizontal ground. Run Applet... Here is another applet showing projectile motion with no air resistance.

HPS 0410 Einstein for Everyone Title page, Preface and Table of Contents for Einstein for Everyone Introduction: the Questions Special Relativity Special Relativity: the Principles Special Relativity: Clocks and Rods Special Relativity: Adding Velocities Special Relativity: the Relativity of Simultaneity Is Special Relativity Paradoxical? E=mc2 Origins of Special Relativity Einstein's Pathway to Special Relativity Spacetime Spacetime Spacetime and the Relativity of Simultaneity Spacetime, Tachyons, Twins and Clocks What is a four dimensional space like? Philosophical Significance of the Special Theory of Relativity. Skeptical Morals Morals About Theory and Evidence Morals About Time The Conventionality of Simultaneity Non-Euclidean Geometry Euclidean Geometry: The First Great Science Euclid's Fifth Postulate Non-Euclidean Geometry: A Sample Construction Non-Euclidean Geometry and Curved Spaces Spaces of Constant Curvature Spaces of Variable Curvature General Relativity General Relativity Gravity Near a Massive Body Cosmology and Black Holes

Matrix mechanics Matrix mechanics is a formulation of quantum mechanics created by Werner Heisenberg, Max Born, and Pascual Jordan in 1925. Matrix mechanics was the first conceptually autonomous and logically consistent formulation of quantum mechanics. It extended the Bohr Model by describing how the quantum jumps occur. It did so by interpreting the physical properties of particles as matrices that evolve in time. Development of matrix mechanics In 1925, Werner Heisenberg, Max Born, and Pascual Jordan formulated the matrix mechanics representation of quantum mechanics. Epiphany at Helgoland In 1925 Werner Heisenberg was working in Göttingen on the problem of calculating the spectral lines of hydrogen. "It was about three o' clock at night when the final result of the calculation lay before me. The Three Papers After Heisenberg returned to Göttingen, he showed Wolfgang Pauli his calculations, commenting at one point:[2] In the paper, Heisenberg formulated quantum theory without sharp electron orbits. .