Math, Physics, and Engineering Applets Oscillations and Waves Acoustics Signal Processing Electricity and Magnetism: Statics Electrodynamics Quantum Mechanics Linear Algebra Vector Calculus Thermodynamics Mechanics Miscellaneous Licensing info. Links to other educational sites with math/physics-related information or java applets useful for teaching: And when you get tired of learning, here is some fun stuff: Pong Simulation Circuit-level simulation of original 1972 Pong. Adivina la imagen This webpage uses the Geometrize Haxe library to transform images into shapes. It's a demo for Geometrize, my open source desktop app designed for recreating images as geometric primitives. Given an image to recreate, Geometrize generates hundreds of random shapes, and repeatedly mutates these as part of a hillclimbing optimization approach. Internally, this demo uses a web worker so the webpage remains responsive while the geometrization algorithm ranks thousands of these shapes behind the scenes, only picking the best-fitting shapes for use in the final image. The "Run/Pause" button starts or stops the geometrization process, the "Step" button adds one primitive to the image when pressed, the "Open Image" button lets you select your own images, the "Random Image" button picks a random preset image, and the "Reset" button clears all of the current shapes, restarting the geometrization from scratch. Additional controls are accessed by clicking on the "Settings" section.
Western Philosophy Rock-paper-scissors-lizard-Spock A diagram explaining the outcomes of the game The normal form matrix of rock-paper-scissors-lizard-Spock. Rows represent available choices for player 1, columns those for player 2. Numbers in cells show utility (payoff) for player 1, player 2. Rock-paper-scissors-lizard-Spock is an expansion of the classic selection method game rock-paper-scissors. Rules[edit] The rules of rock-paper-scissors-lizard-Spock are: There are ten possible pairings of the five gestures; each gesture beats two of the other gestures and is beaten by the remaining two. References[edit]
An Essay by Einstein -- The World As I See It "How strange is the lot of us mortals! Each of us is here for a brief sojourn; for what purpose he knows not, though he sometimes thinks he senses it. But without deeper reflection one knows from daily life that one exists for other people -- first of all for those upon whose smiles and well-being our own happiness is wholly dependent, and then for the many, unknown to us, to whose destinies we are bound by the ties of sympathy. A hundred times every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving... "I have never looked upon ease and happiness as ends in themselves -- this critical basis I call the ideal of a pigsty. The ideals that have lighted my way, and time after time have given me new courage to face life cheerfully, have been Kindness, Beauty, and Truth. "My political ideal is democracy.
Relativistic Baseball What would happen if you tried to hit a baseball pitched at 90% the speed of light? - Ellen McManis Let’s set aside the question of how we got the baseball moving that fast. We'll suppose it's a normal pitch, except in the instant the pitcher releases the ball, it magically accelerates to 0.9c. The answer turns out to be “a lot of things”, and they all happen very quickly, and it doesn’t end well for the batter (or the pitcher). The ball is going so fast that everything else is practically stationary. The ideas of aerodynamics don’t apply here. These gamma rays and debris expand outward in a bubble centered on the pitcher’s mound. The constant fusion at the front of the ball pushes back on it, slowing it down, as if the ball were a rocket flying tail-first while firing its engines. After about 70 nanoseconds the ball arrives at home plate. When it reaches the batter, the center of the cloud is still moving at an appreciable fraction of the speed of light.