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"Mechanical Waves are waves which propagate through a material medium (solid, liquid, or gas) at a wave speed which depends on the elastic and inertial properties of that medium. There are two basic types of wave motion for mechanical waves: longitudinal waves and transverse waves. The animations below demonstrate both types of wave and illustrate the difference between the motion of the wave and the motion of the particles in the medium through which the wave is travelling."

"series of experiments about sound and its application to animals, musical instruments and communications. This unit was designed for use in the second grade. "

"Check out our fun flight facts for kids and learn how planes fly as well as interesting information about aviation history, the Wright Brothers, animals that fly and much more."

"Click an engine to see how it works. Four stroke Four stroke Diesel Diesel Two stroke Two stroke Wankel Wankel Atkinson Atkinson Gnome Rotary"

"Best known for his "inventions", Rube's early years as an engineer informed his most acclaimed work. A Rube Goldberg contraption - an elaborate set of arms, wheels, gears, handles, cups and rods, put in motion by balls, canary cages, pails, boots, bathtubs, paddles and live animals - takes a simple task and makes it extraordinarily complicated. He had solutions for How To Get The Cotton Out Of An Aspirin Bottle, imagined a Self-Operating Napkin, and created a Simple Alarm Clock - to name just a few of his hilariously depicted drawings. "

"the study of linear algebra, the theory and practice of analyzing linear relations and their behavior under linear transformations. Practically every modern technology relies on linear algebra: simplifying the computations required for internet searches, 3-D animation, coordination of safety systems, financial trading, air traffic control, and everything in between. Five major topics are addressed: linear systems of equations, vector spaces, matrices and linear transformations, determinants, similarity, and eigenvalues. This free course may be completed online at any time."

"An elephant's hairs help heat travel away from the skin. According to the study, a light breeze is enough to significantly cool an elephant, increasing its heat loss by 20 per cent. Elephants, big leathery animals that they are, need to know how to cool off. They also use their trunks to splash water and mud on themselves."

"Weathering is the breaking down or dissolving of rocks and minerals on Earth's surface. Water, ice, acids, salt, plants, animals, and changes in temperature are all agents of weathering."

"This site offers a growing bank of imaginative, highly visual teaching-aids developed for use with interactive whiteboards in 11-18 Schools. The resources are designed to be used as rich sources of visually stimulating material, making use of both animations and drag and drop interactivity. The appropriate Key Stage is indicated for each resource. "

"Through inventiveness and breakthrough science and the use of existing technology that allows us to do more with less resources. Add an economic driver to this combination and you have cleantech."

"Everybody learns better when they are having fun! Here at Quiz-Tree.com you will find educational games and quizzes on many subjects, including Math, Reading, Spanish, Geography, SAT, Spelling, Music and more. All activities come with animated interface, fun sounds and other cool features that make learning more enjoyable. "

"Smart phones help farming instructors teach agriculture classes in remote areas. Simple animation allows the project to tailor the instruction by customizing it to the language of the region. "

high school program - two online aviation courses, lecture material, educational video, 3D animations, interactive questions, and other multimedia learning tools.

" The BioDigital Human is an HTML5 bases platform for medicine and healthcare. Using 3-D, Web-GL visualization the BioDigital Human serves as an interactive tool for medical students to access complex human anatomy in a simple web browser. The surgical and disease-state animations embedded into the interface provide an interactive visual-aid for medical device and pharmaceutical sales reps to explain medical concepts to healthcare practitioners. As anatomical landmarks are paired with embedded education, instructive and training information, the BioDigital Human is the most intuitive way for data groups to organize and navigate medical information. "

" Discover rock secrets through these activities. Create a rock collection as you learn about the three main types of rock, find out how to tell the different rock types apart, and see how rocks change from one type into another!"

"In this INDEX the numerals refer to the engravings and the numbered paragraphs. Each page contains all the descriptive matter appertaining to the illustrations

"The four-stroke cycle (or Otto cycle) of an internal combustion engine is the cycle most commonly used for automotive and industrial purposes today (cars and trucks, generators, etc). It was conceptualized by the French engineer, Alphonse Beau de Rochas in 1862, and independently, by the German engineer Nikolaus Otto [[1]] in 1876."