A browser-based simulation of bouncing balls with adjustable radius, wall elasticity, air resistance and gravity. Balls can be added by clicking or dragging, and can be free, fixed, connected or attached with a spring. Links to a GitHub repository and English, Traditional Chinese and Simplified Chinese versions are provided.
eCalc provides simulation tools for electric drives, including calculators for airplane propellers, multirotors, helicopters, EDF jets, and electric cars. The site lists a motor database and a restricted free demo version with reduced functionality and partial database access. It has been presented as offering reliable predictions since 2004.
Park School Mathematics is a site presenting a series of mathematics books, from Book 1: Reasoning and Proving through Book 10: Functions and Models II, plus additional custom books. Book pages list lessons covering topics such as combinatorics, linear equations, quadratic models, graph theory, geometric proof, circular functions, algorithms, logarithms and recursion.
Animated Engines is an educational resource for documentaries, courses, books, reference material, or self-learning.
PicaSim is a flight simulator for radio controlled aircraft, focusing mainly on gliders with some other aircraft. It is available free on Android, Apple/iOS and Windows, and development is on hold.
Erich's Packing Center is an educational resource for documentaries, courses, books, reference material, or self-learning.
Biology Online is described as a database of biology terms and topics, offering search over terms, news and articles. The site states it has existed since 2001 and addresses biology questions from professors, students and professionals.
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eCalc provides simulation tools for electric drives, including calculators for airplane propellers, multirotors, helicopters, EDF jets, and electric cars. The site lists a motor database and a restricted free demo version with reduced functionality and partial database access. It has been presented as offering reliable predictions since 2004.
Park School Mathematics is a site presenting a series of mathematics books, from Book 1: Reasoning and Proving through Book 10: Functions and Models II, plus additional custom books. Book pages list lessons covering topics such as combinatorics, linear equations, quadratic models, graph theory, geometric proof, circular functions, algorithms, logarithms and recursion.
Animated Engines is an educational resource for documentaries, courses, books, reference material, or self-learning.
PicaSim is a flight simulator for radio controlled aircraft, focusing mainly on gliders with some other aircraft. It is available free on Android, Apple/iOS and Windows, and development is on hold.
Erich's Packing Center is an educational resource for documentaries, courses, books, reference material, or self-learning.
Biology Online is described as a database of biology terms and topics, offering search over terms, news and articles. The site states it has existed since 2001 and addresses biology questions from professors, students and professionals.
