Planespotters.net is a civil aviation database with 1 million photos and information on 50,000 aircraft. It provides information on registrations, airframes and airlines, along with aviation photos, latest deliveries and photo news.
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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 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.
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.
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.
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.
Aerospaceweb.org is a non-profit site operated by engineers and scientists in the aerospace field. It provides educational information on subjects ranging from aviation to space travel to aerospace technology. Its sections include a virtual aircraft museum, design articles, visitor questions, and calculators for aerodynamic and atmospheric properties.
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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 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.
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.
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.
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.
Aerospaceweb.org is a non-profit site operated by engineers and scientists in the aerospace field. It provides educational information on subjects ranging from aviation to space travel to aerospace technology. Its sections include a virtual aircraft museum, design articles, visitor questions, and calculators for aerodynamic and atmospheric properties.
