background preloader

Physics and teaching

Facebook Twitter

Projects » Cohn-zone. Here are a few of my projects..

Projects » Cohn-zone

This list is not complete. Project-x Project-x is an 18 foot animatronic pumpkin man for Vermont Haunted forest The Time Cycle. Thermal photography. Applications Thermal imaging can be used to document heat/AC leaks from insulation gaps on a building's facade, reveal warmer ground water inflows (either fresh or chemical-laden) or "thermal pollution" from industrial processes entering ocean-temperature waterbodies, as well as identify areas on the human body experiencing infection or stress (includes epidemiological applications).

Thermal photography

Community applications so far include both a "heat-busters" program in East Harlem and a "forensic" water quality monitoring program in the Gowanus Canal. Approaches There are three prototypes in development: Problem. Pranav Mistry. Calculations - DiracDelta Science & Engineering Encyclopedia. Physics. Electromagnetic radiation. The electromagnetic waves that compose electromagnetic radiation can be imagined as a self-propagating transverse oscillating wave of electric and magnetic fields.

Electromagnetic radiation

This diagram shows a plane linearly polarized EMR wave propagating from left to right. The electric field is in a vertical plane and the magnetic field in a horizontal plane. The two types of fields in EMR waves are always in phase with each other with a fixed ratio of electric to magnetic field intensity. Electromagnetic radiation (EM radiation or EMR) is a form of radiant energy, propagating through space via electromagnetic waves and/or particles called photons.

In a vacuum, it propagates at a characteristic speed, the speed of light, normally in straight lines. In classical physics, EMR is considered to be produced when charged particles are accelerated by forces acting on them. Liquid Crystal Group Hamburg. General Relativity — Einstein Online. With the general theory of relativity, in which Einstein managed to reconcile relativity and gravitation, he had to discard the traditional physics worldview, which saw space as merely a stage on which the events of the world unfold.

General Relativity — Einstein Online

SudoGlove Hardware Controller. Demoing the SudoGlove at the 2011 Open Hardware Summit What is the SudoGlove?

SudoGlove Hardware Controller

The SudoGlove is a gesture controller that can be easily interfaced with hardware or software via a wireless connection. The glove implements an array of sensors plus filtering circuitry and mathematical analysis firmware to derive state values for each sensor and transmits them to an authorized receiver. I have used the glove to drive an RC car, to synthesize music, to manipulate openGL video, to control arbitrary processing software, and to control performance lighting effects. You can see videos and examples of these interfaces below. Table of contents. Science Central. Muslims Inventions in the Golden Age. How to design automata and mechanical toys. Brief History of Automata The following buttons will lead you on to a number of topics designed to help you understand more about mechanisms, basic engineering principles as well as designing and making your own automata and mechanical toys.

How to design automata and mechanical toys

Craft Education have two books entitled: 'How to Design and Make Automata' and 'How to Design and Make Simple Automata' as well as aCD-ROM for more information click on the links below. Tools and Construction Techniques. Association of Science-Technology Centers. Astable Multivibrator (Oscillator) This circuit is an astable multivibrator, or oscillator.

Astable Multivibrator (Oscillator)

The two transistors are cross-coupled in such a way that the circuit switches back and forth between two states. In one state, the base of Q1 is about one diode drop above ground, allowing a base current to flow. This keeps Q1 switched on, in saturation mode, allowing a current to flow through the collector, keeping Q1's collector voltage low, and discharging C1. Q2 is switched off, because its base voltage is not high enough to switch it on. As the collector current into Q1 charges C1, the base voltage for Q2 goes up, until it is high enough to switch on Q2, causing a current to flow through its collector, which drops the collector voltage (the current causes a voltage drop across the resistor above it). Magnetic Movie. The secret lives of invisible magnetic fields are revealed as chaotic ever-changing geometries .

Magnetic Movie

All action takes place around NASA’s Space Sciences Laboratories, UC Berkeley, to recordings of space scientists describing their discoveries. Actual VLF audio recordings control the evolution of the fields as they delve into our inaudible surroundings, revealing recurrent ‘whistlers’ produced by fleeting electrons . Are we observing a series of scientific experiments, the universe in flux, or a documentary of a fictional world? Magnet Man - Cool Experiments with Magnets.

Cool Experiments with Magnets.

Magnet Man - Cool Experiments with Magnets

Using a Laser to Measure the Speed of Light in Gelatin. Please ensure you have JavaScript enabled in your browser.

Using a Laser to Measure the Speed of Light in Gelatin

Dynamic Periodic Table. Help NASA find life on Mars. Keith's Think Zone. Vacuum Cleaner Used for Climbing Up Wall. An impressive homemade wall climbing system from a simple vacuum cleaner was created by a scientist from BBC. After being bitten by a radioactive spider, the mild-mannered Peter Parker in the Spiderman movies and comics finds himself able to climb up the side of buildings. The enterprising scientist Jem Stansfield got the same effect in real life from the two vacuum cleaners purchased at Tesco. Aurora Detectors. Physics Solar Workshop. Solar power technology in action. In one way or another, almost every form of energy we use originates as energy from the Sun. Solar energy directly powers photovoltaic cells and thermal collectors. Indirectly, we get power from plants grown by the Sun, oceans heated by the Sun, and Earths weather systems sustained by the Sun. Even the energy stored in fossil fuels originated as energy from the Sun, captured by plants and animals millions of years ago.

Physics Solar Workshop explores the topic of solar energy, focusing on photovoltaic cells. Features: This kit is part of Thames and Kosmos physics series which provide a comprehensive curriculum of hands-on physics education for grammar and middle school age students. Activities: Build 12 models, including a solar-powered tractor, truck, treaded vehicle, car, elevator, drawbridge, fan, airplane, mobile crane and construction cranelearn about harnessing and using solar powerlearn about motors and simple machines. Tekniska museet - Tekniska museet.