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The Periodic Table of Videos is a project by video journalist Brady Haran working with chemists at the University of Nottingham. It provides short videos about every element on the periodic table, plus experiments and other chemistry content. All 118 elements have videos, which are being updated.
Ray Optics Simulation is a web-based tool for creating and simulating 2D geometric optical scenes interactively. It provides components such as single rays, beams, mirrors, glass, ideal lenses, diffraction gratings, detectors and a ruler, with views for rays, extended rays, images and colors. Source code is available on GitHub.
Jacobs Rocketry covers experimental rocketry focused on sugar propellant in PVC motor cases, along with selected high power rocketry topics. The site includes a store, rocketry basics, water rockets, links, and a free 1979 manual on homemade black powder rocket engines.
Macroinvertebrates.org is a taxonomy browsing site for aquatic macroinvertebrates. It presents insect orders, families and genera, including beetles, true flies, mayflies, dragonflies and stoneflies, with collection and taxa list views. It also provides an identification key, training materials, a practice quiz, a glossary and a PocketMacros app.
ISciDAVis is an educational resource for documentaries, courses, books, reference material, or self-learning.
Motion Mountain is a free physics textbook for students, teachers and others curious about motion in nature. The 2021 edition is offered as five PDF volumes, with an English original improved for over 20 years and volunteer translations in several languages.
