Is there any proof that aliens exist?
By: Jonte Rhodes
The existence of aliens is something that has fascinated people for many years, and has yet to be proved either to be true or false. Thousands of people will attest that they have seen UFOs in the sky at night, or that they have been...
What are the general design principles of a spacecraft
By: Karim Sultan
When one thinks of a spacecraft, images of star destroyers from Star Wars, the Enterprise from Star Trek, and the Discovery One from 2001: A Space Odyssey may come to mind. A contemporary view includes NASA's space shuttles and the Russian Soyuz series. But early...
By: Jonte Rhodes
Carbon is the fourth most common element in the universe, behind hydrogen, helium and oxygen respectively, and is also the basis of all forms of life on earth. The name carbon comes from the Latin word Carbo, meaning coal, which was probably its earliest discovered...
By: Alison Bowler
Tin Symbol: Sn Atomic Number: 50 Atomic Mass: 118.71 amu (atomic mass units) Melting Point: 231.9 C (505.05 K, 449.41998 F) Boiling Point: 2270.0 C (2543.15 K, 4118.0 F) Number of Protons: 50 Number of Electrons: 50 Number...
Where UFOs come from
UFO
By: Trevor Carter
Unidentified Flying Objects are multi-faceted mysteries. Many authors have explored the UFO enigma. Some have speculated that UFOs represent interplanetary craft, while others approach the subject from a more exotic viewpoint, giving thought to the theories of inter-dimensional beings. Regardless of what theories are supported...
By: Raven Lebeau
The famous blue bottle experiment a visually dramatic way to teach reduction-oxidation (redox) chemistry. Students from grade school to grad school find this reaction memorable and it is considered a classic staple in chemical demonstration shows. A half-full bottle of colorless liquid turns blue when...
By: Cody Hodge
Ever since man became aware of itself, we have looked up to the heavens with great wonder. As we try to understand the physical world around us, we also have learned more and more about the universe. No matter how much we learn though, there...
By: Alison Bowler
Darmstadtium Symbol: Ds Atomic Number: 110 Atomic Mass: 281 amu (atomic mass units) Melting Point: Unknown Boiling Point: Unknown Number of Protons: 110 Number of Electrons: 110 Number of Neutrons: 171 Classification: Transition Metal (Man made) Crystal Structure: Unknown Density @ 293 K: Unknown Color:...
Could there be a Basic Particle
By: Dave Nocera
Balance a pencil on your finger and you will quickly learn that the pencil behaves as if its entire mass were concentrated at the center of the pencil, the center of mass. The center of mass between any number of particles lies at an average...
By: Alison Bowler
Manganese Symbol: Mn Atomic Number: 25 Atomic Mass: 54.93805 amu (atomic mass units) Melting Point: 1245.0 C (1518.15 K, 2273.0 F) Boiling Point: 1962.0 C (2235.15 K, 3563.6 F) Number of Protons: 25 Number of Electrons: 25 Number...

 

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