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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.
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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.
Stitz Zeager Open Source Mathematics provides free and open precalculus materials, including College Algebra, College Trigonometry and Precalculus textbooks by Carl Stitz and Jeff Zeager. A Precalculus 4i edition is available free on the interactive Ximera platform. Printed desk copies are offered to Verified Teachers through openintro.org.
Outerzone is an archive that collects and shares plans of vintage and old-timer flying model airplanes for free. The site states it has 16,962 plans available for free download and does not require a login. It also notes it is currently dealing with a trademark dispute involving a similarly named site.
ISciDAVis is an educational resource for documentaries, courses, books, reference material, or self-learning.
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.
