Tungsten is an element (symbol: W, atomic number 74) discovered in the late 18th century. Almost tw

A tungsten filament is a stranded tiella metal thin shining a very bright when electric current is passed therethrough. When wrapped and sealed within a glass container filled with an inert gas, a tungsten tiella filament can sufficiently bright light to illuminate a room. It was the inclusion of a tungsten filament in his electric lighting system which has led the world by giving credit for Thomas Edison invented the electric light, when in fact dozens tiella of scientists have been experimenting with the system electric light.
Tungsten is an element (symbol: W, atomic number 74) discovered in the late 18th century. Almost twice as dense as lead, it has the highest of all metals 6192 F (3422 C) melting tiella point; all elements, only the melting point is higher carbon. These properties are very useful not only in tungsten electrical technology, but also for military applications as weapons curing. Another use of tungsten is also a component tiella of jewelry, where it is combined with other materials to form highly tiella hard and bright compounds, but they may be fragile.
When Thomas Edison and other scientists worked on the development of the light bulb, they experimented with a number of materials for the incandescent lamp production. Until the early 20th century, the most successful incandescent filament used carbonized bamboo, which lasted about 1,200 hours. Edison was not the first to use tungsten, which was presented as a filament for the incandescent bulb in Europe in 1904.
In 1906, Edison General Electric (GE) has developed a process for manufacturing pure tungsten flexible enough tiella to draw in a coiled wire. Using a GE wound allowed to increase the surface of tungsten is within the wire bulb. In 1911, the company manufactured and sold light bulbs with new filaments, which survived all others. The progress of this technology has continued almost without interruption, so that the operating cost of an incandescent bulb by the end of the 21st century was less than 5% of what it was in 1911.
Despite his success as a light source for incandescent bulbs, the tungsten filament is remarkably ineffective in producing light. Approximately 90% of the electricity consumed in the operation of an incandescent light bulb is emitted as heat, not light. As more effective to produce light methods have been developed, including fluorescent lighting and light emitting diodes (LED), others have called for a ban on incandescent light bulbs as an energy saving measure.
Anatomy and physiology Animals and Cholesterol Diabetes economy flora and its benefits Pregnancy and baby care essential oils Computing & Internet Food and Nutrition Environment Biology Cancer Mesothelioma Calories Fruits and vegetables Treatments for Urinary tiella Disorders Vitamins spices technological world Health Medicine & Therapy Neurology and Urinary Health Wellness Health intestinal and digestive emotional tiella health sciences and engineering circulatory system and urinary system tobacco alcohol Thyroid integumentary system
Monocytes are white blood cells that are common in the blood of all vertebrates and help the immune system function ...