ConvertAll is a unit converter that allows combining units in arbitrary ways, including units with non-linear scales such as temperature. Units may be entered by name or abbreviation and combined with operators, and unit data includes over 500 units. A single code base runs on Linux, Windows, Android and the web.
WebElements presents the periodic table of the elements. The table arranges the chemical elements by atomic number so that periodic properties are made clear, and each entry gives the element's symbol, atomic weight and name.
Ptable is an interactive periodic table of the elements showing names, electrons and oxidation states. It offers visualization of trends, 3D orbitals and isotopes, and allows users to mix compounds, with fully descriptive writeups.
The Useful Tropical Plants Database contains information on the edible, medicinal and other uses of several thousand plants grown in tropical regions. It is a work in progress, with records added and updated regularly. It currently lists 13362 species, and information is fully referenced.
A project for an amateur-built liquid fueled rocket engine and flight vehicle, with a site covering engine designs, igniters, a rocket, test stand and software. A launch of Rocket 1 reached 10,800 ft after about 10.5 seconds of engine run time.
The WebQC Balance Calculator is an online tool for balancing chemical equations, offering step-by-step solutions by inspection and by the algebraic method. It also reports reaction type, stoichiometry and limiting reagent. Users enter an equation or reagents and click to balance.
A virtual museum of pure chemical elements from the periodic table, with images and information published under a Creative Commons license. It includes a periodic table linking to element pages, plus games, calculators, and a simulation.
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WebElements presents the periodic table of the elements. The table arranges the chemical elements by atomic number so that periodic properties are made clear, and each entry gives the element's symbol, atomic weight and name.
Ptable is an interactive periodic table of the elements showing names, electrons and oxidation states. It offers visualization of trends, 3D orbitals and isotopes, and allows users to mix compounds, with fully descriptive writeups.
The Useful Tropical Plants Database contains information on the edible, medicinal and other uses of several thousand plants grown in tropical regions. It is a work in progress, with records added and updated regularly. It currently lists 13362 species, and information is fully referenced.
A project for an amateur-built liquid fueled rocket engine and flight vehicle, with a site covering engine designs, igniters, a rocket, test stand and software. A launch of Rocket 1 reached 10,800 ft after about 10.5 seconds of engine run time.
The WebQC Balance Calculator is an online tool for balancing chemical equations, offering step-by-step solutions by inspection and by the algebraic method. It also reports reaction type, stoichiometry and limiting reagent. Users enter an equation or reagents and click to balance.
A virtual museum of pure chemical elements from the periodic table, with images and information published under a Creative Commons license. It includes a periodic table linking to element pages, plus games, calculators, and a simulation.
