By: May Monten
The Chemistry Olympiad is an international competition for high school students. Talented chemistry students compete at the local level, with winners moving on to national competitions. Four winners from each country go on to compete against teams from around the world.* HistoryThe International Chemistry...
By: Earl Roske
Despite the rumors out there, understanding acids, bases and pH is about as easy as, well, using a seesaw. Most people know what a seesaw is, right? A plank of wood balanced on a fulcrum, some pivoting point. A perfect seesaw is balanced, both sides...
By: Dr Pandula Siribaddana
When considering the efficiency of most electrical and mechanical appliances, it is evident that some portion of the energy utilized for their operation becomes wasted as heat. If such wasted energy can be utilized to produce electricity, it will not only help to save costs...
Applications of thermoelectric materials
By: Olivia Kay
Ever since thermoelectricity was first discovered in 1821, scientists have been working hard to further develop its principles and applications. When new discoveries are made, more ideas come from them, and more advancement occurs. Thermoelectricity revolves around the concept that when certain materials are heated...
By: Julie Thomas-Zucker
Skutterudites are hydrothermal ore crystals that contain nickel. These ores have important technological uses. They have thermoelectric properties that may replace cobalt applications in the future. Skutterudites occur in nature with erythrite. Because they have very low thermal conductivity, very high p-type mobility values, large...
Applications of thermoelectric materials
By: Jennifer Rempe
Thermoelectric materials could be a key to energy savings. These materials convert heat into electricity, or electricity into heat. A thermoelectric device creates a voltage when there is a difference in temperature on each side of the device, e.g. when one side is hot...
By: M. Reza Tirgan
According to HPPH at www.Hparticles.com/, "Dark matter is a form of matter that does not emit light, absorb light, or scatter light. Its only interactions are gravitational"http://www.astro.ucla.edyu/~wright/glossary.html. The exited H particle-paths due to mass diminution as the subject of...
By: Derotha Ann Reynolds
DDT is, technically, dichloro-diphenyl-trichloroethane, a chemical compound that was produced in a Scottish laboratory in 1873 by Othmar Zeidler. In 1939, Paul Mueller, working in Switzerland, discovered that DDT was in fact an insecticide, and was awarded the Nobel Peace prize for his work. During...
By: Gareth Great
Elements are the simplest substance on Earth and it make up all matter. Most elements exist freely in nature such as silver, gold, sulfur, oxygen, nitrogen, and copper while some are in combined or compound form. When elements combine chemically, they form compounds. And when...
By: Leigh Goessl
Recently astronomers made a fascinating discovery when they were probing in space looking around dwarf planet Pluto. NASA scientists were actually searching for rings around the icy planet when they stumbled upon the astonishing fact that Pluto has a fourth moon. The moon was found...

 

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