Physical Science
How long is a fortnight?
By: Jade Jumbo
Many of the other writers have stated that a fortnight is generally thought of as fourteen nights / fifteen days and, as a general rule, I would agree with them. Where I live, in northern Spain, the phrase 'quince dias', fifteen days, would seem to...
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How MRI works
By: Jacob Stanley
You probably learned at some point that everything, all of matter, is composed of atoms. These atoms, in turn, are composed of electrons orbiting a central nucleus. The nucleus is composed of protons and neutrons, and how many protons the nucleus has determines what we...
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The chemistry of soap
By: David Smith - 534884
Actually, all soaps are detergents, because "detergent" is a broader term than "soap". One chemistry book author proposed the term "syndet" to distinguish soaps from synthetic detergents, but it did not catch very much attention, since it was a rather silly term. As the previous...
By: L A Myers-Campos
The length of a star's life and what takes place in that life span depends mainly on its total mass. The more massive the star, the longer and more dramatically it lives, and dies. The smallest stars go out with a quiet unseen whimper, while...
By: Rene Thibodeaux
A Faraday cage is generally used to block electromagnetic interference (EMI) from sensitive electronic equipment. It is an enclosure formed by a solid or fine meshed conductor. Michael Faraday in 1836 discovered an electrical charge resided on the outside of an enclosed conductor and did...
By: Ernest Capraro
Envision that tremulous moment when little Bobby reached to place the nine-hundred thirty-second domino (with only sixty-eight remaining) just as the telephone rang. He twitched, and the tap from his finger sent the entire chain spilling dramatically in spirals and branches, mere moments before he...
By: James Angel
Properties of Matter [Our basic existence] [article one] Isn't it humerus that we live in a world of complete and utter chaos. Our entire existence is built upon a random sequence of events it would appear. However, how can we say this, thus, our...
By: Pat Lunsford
There are a number of UFO photographs circulating the Internet, the majority of which are hoaxes. Nevertheless, amid this barrage of unreliable information there is too much reliable and substantiated evidence to ignore, including several military sightings on multiple radars. The problem lies with having...
By: Joyce V Harrison
The Northern Lights were named for an ancient Roman goddess and Greek god. In Latin, Aurora means dawn and Boreas comes from the Greek word for the north wind. The term dates back to 1619 when Galileo Galilei thought the display was a reflection of...
The best sources of energy for the future
By: Dan Hiland - 512667
Thermal Energy Storage: The PCM- Eutectic Solution Energy use has always been one of the costs of doing business, and like taxes, is an expense that will probably never go away. Unlike taxes, though, energy expense is something over which the business owner can exercise...
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