By: G E Barr
Tungsten is a grayish white metal discovered in 1758 and derived from the Swedish word meaning "heavy stone". In 1753 a couple of Spanish chemists seperated Tungsten from Wolframite. At 6,292 F, it has the highest melting point of all metals. Its symbol is...
By: iakul
Stars twinkle because of turbulence in the Earth's atmosphere. While this certainly answers the question, it's not an answer that the average joe can relate to, so here's the answer explained using everyday terms and objects.Have you ever seen the air shimmer on a...
The Cetus Constellation explained
By: Tasha Raymond
When many think of astronomy, constellations are the fist thing that come to mind. They are something that any person can see, and with the right prompting, see the specific image that they are named for. There are many that say constellations tell a story...
By: Vicki Phipps
Twinkling stars have inspired songs from the heart, and as the song says, "Twinkle, twinkle little star, how I wonder what you are." Everyone has wondered why stars twinkle. Like diamonds in the sky, they appear as if twinkling is a hint from God...
Relative
By: Glen R. Taylor
Time is one of the great mysteries of science, and that is not because it is difficult to examine, like some distant star. Its elusiveness is due to its ubiquity in our lives. One way or another, time enters into almost every equation in science...
By: Vicki Phipps
It was June 30, 1908 and at exactly 7:17 am when a huge explosion shook the Earth from several miles in the air above the Tunguska region of Siberia. It has the force of a large nuclear bomb and was probably a small asteroid or...
An overview about the chemical element Arsenic
By: Tasha Raymond
Atomic Number: 33Atomic Symbol: As Atomic Category: metalloidsAtomic Mass: 74.92Boiling Point: 603 degrees CelsiusAppearance: Metallic greyArsenic was first isolated by Geber (721 - 815), an Arabian alchemist. It is believed that Albertus Magnus (Albert the Great, 1193 - 1280) was the first European to...
The basics of Quantum physics
By: John Cowley
"What are little girls made of?"The traditional answer found in the nursery rhyme is "sugar and spice and all things nice". In other words little girls are made of bits and pieces of things, as are little boys although apparently not such nice things...
By: David Koehler
In terms of time, a lightyear is, well, just one year. It's a little more than a major league baseball season if you include spring training and post season games. One year is not much time; at least it's not much time at my advanced...
By: Ernest Capraro
Sodium is always a crowd pleaser. As an alkali (Group I) metal, it reacts easily to lose an electron. In fact, it reacts so readily with other materials that it is never found in the pure state in nature. Most people are familiar with common...

 

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