The Physics Classroom

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. Class 10 - ICSE Board - Mathematics, Science (Physics, Chemistry, Biology), Social Studies (Geography, History, Civics & Economics) - Study Material, Animated Videos, Summary, Questions and Answers, Wiki, References - LearnNext Online LearnNext Lesson Video In 1827, a German physicist Georg Simon Ohm (1787–1854) formulated the relationship between the electric current I, flowing in a metallic wire and the potential difference across its terminals. Ohm’s law states that at a constant temperature, current I through a conductor between two points is directly proportional to the potential difference or voltage, V, across the two points. Thus, the ratio V: I is constant, and is called the resistance, R, of the conductor.

Peanut Software Homepage Page last updated: 13 Sept 12 For automatic notification of updates to these pages, you can subscribe to my RSS feed. My page of FAQ (27 Sept 10) is added to as necessary. If you encounter a significant problem (26 Jun 12), you may wish to share the details (my e-mail address is in the Help|About dialog box). Click the following links to reach the download pages: Optics: Light, Color, and Their Uses Educator Guide Product Type: Educator GuideAudience: Educators, Informal EducationGrade Levels: K-12Publication Year: 2000Product Number: EG-2000-10-64-MSFCSubjects: Physical Science The guide contains color and light activities using lenses, prisms and mirrors to create telescopes, periscopes, microscopes and kaleidoscopes. Other activities include finding focal length and understanding reflection, refraction and diffraction. Activities are marked by grade level. Optics Educator Guide [6MB PDF file]

Suprathreshold stochastic resonance Suprathreshold Stochastic Resonance (SSR) is a variant of stochastic resonance (SR) that occurs for a specific set of conditions that are somewhat different from those of stochastic resonance. Like stochastic resonance, suprathreshold stochastic resonance describes the observation of noise enhanced behaviour in signal processing systems. Unlike conventional stochastic resonance, suprathreshold stochastic resonance does not disappear when the signal is no longer "subthreshold." Introduction Suprathreshold stochastic resonance was first demonstrated in arrays of identical threshold devices in 2000. This initial work (Stocks 2000) assumed an aperiodic random input signal (meaning that suprathreshold stochastic resonance is a form of aperiodic stochastic resonance), and stochastic resonance was shown to occur in the Shannon average mutual information between the input and output of the array.

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 Newbie Electronics Hobbyist Reference Poster Bundle Save almost 50% than buying each individual printed posters. There’s nothing more helpful in your learning experience without having a complete set of visual assistants. These basic posters will accelerate your building blocks in learning electronics and building projects. This bundle includes the following posters: Basic Electronics Theory Cheatsheet PosterCommon Components Cheatsheet PosterSchematic Symbols Cheatsheet PosterUseful Math and Constants Cheatsheet Poster

Math, Physics, and Engineering Applets Oscillations and Waves Acoustics Signal Processing Electricity and Magnetism: Statics The Best Edible Science Experiments You'll Actually Want to Eat Hands-on science experiments and projects are always a hit with kids, in the classroom and at home. Want to make them even better? Make them delicious, too! There are plenty of food and kitchen science projects out there, but not all of them are exactly tasty. That’s what sets this list apart from the rest: These edible science projects are actually good enough to eat!