Some Misc facts
- Earth moves at approx 30 Km/s:
30 Kilmoeters in 1 Second 1800 Kilometers in 1 Minute 108000 Kilometers in 1 Hour
- It takes 248.1 years for Pluto to completely circle around sun.
It has only completed 1/3 of it’s path around the sun since it’s discovery in 1930.
- Kola Superdeep Borehole was 12,262 metres deep. Earth has radius of 6,371 kilometers.
- General Electric(GE):
In 1905, GE brought toasters and electric ranges into American homes. In 1917, GE introduced "the first hermetically sealed home refrigerators." In 1930, the first electric washing machine. In 1935, GE lamps lit the first nighttime baseball game. In 1938, GE invents the fluorescent lamp. In 1942, the first American jet engine. In 1954, the dish washer. In 1957, the first nuclear power plant. In 1958, the can opener. In short, most of home appliances sprang from GE.
- Xerox researchers invented the mouse, the desktop computer, and the graphic user interface.
- Outside the Universe: Defining the universe. Common answer is called the Observable Universe, and it's defined by the speed of light. Since we can only see things when the light they emit or reflect reaches us, we can never see farther than the farthest distance light can travel in the time the universe has existed. That means the observable universe keeps getting bigger, but it is finite – the amount is sometimes referred to as the Hubble Volume. We'll never be able to see beyond that boundary, so for all intents and purposes, it's the only universe we'll ever interact with.
- Unix was derive from the original AT&T Unix, developed in the 1970s at the Bell Labs.
Who Invented the Light Bulb?
Thomas Edison is usually credited with the invention of the light bulb, but the famous American inventor wasn't the only one who contributed to the development of this revolutionary technology. The story of the light bulb begins long before Edison patented the first commercially successful bulb in 1879.
- In 1800, Italian inventor Alessandro Volta developed the first practical method of generating electricity, the voltaic pile.
- Volta's glowing copper wire is also considered to be one of the earliest manifestations of incandescent lighting.
- Humphrey Davy produced the world's first electric lamp by connecting voltaic piles to charcoal electrodes.
- Davy's 1802 invention was known as an electric arc lamp, named for the bright arc of light emitted between its two carbon rods.
- In 1840, British scientist Warren de la Rue developed an efficiently designed light bulb using a coiled platinum filament in place of copper, but the high cost of platinum kept the bulb from becoming a commercial success.
- In 1848, Englishman William Staite improved the longevity of conventional arc lamps by developing a clockwork mechanism that regulated the movement of the lamps' quick-to-erode carbon rods.
- But the cost of the batteries used to power Staite's lamps put a damper on the inventor's commercial ventures.
- In 1850, English chemist Joseph Swan solved the cost-effectiveness problem of previous inventors by developing a light bulb that used carbonized paper filaments placed in a vacuum tube.
- Unfortunately the vacuum pumps of those day were not efficient, and this prototype for a cost-effective bulb never went to market.
- Charles Francis Brush, was busy developing an electric arc lighting system that would eventually be adopted throughout the United States and Europe during the 1880s.
- To power his systems, Brush developed dynamos — or electric generators — similar to those used that would one day be used to power Edison's electric lamps.
- In 1874, Canadian inventors Henry Woodward and Matthew Evans filed a patent for an electric lamp with different-sized carbon rods held between electrodes in a glass cylinder filled with nitrogen.
- The pair tried, unsuccessfully, to commercialize their lamps but eventually sold their patent to Edison in 1879.
- Edison and his team of researchers in Edison's laboratory in Menlo Park, N.J., tested more than 3,000 designs for bulbs between 1878 and 1880.
- In November 1879, Edison filed a patent for an electric lamp with a carbon filament.
- Edison spent the next year finding the perfect filament for his new bulb, testing more than 6,000 plants to determine which material would burn the longest.
- Several months after the 1879 patent was granted, Edison and his team discovered that a carbonized bamboo filament could burn for more than 1,200 hours.
- In 1882, Lewis Howard Latimer, one of Edison's researchers, patented a more efficient way of manufacturing carbon filaments.
- In 1903, Willis R. Whitney invented a treatment for these filaments that allowed them to burn bright without darkening the insides of their glass bulbs.
- William David Coolidge, an American physicist with General Electric, improved the company's method of manufacturing tungsten filaments in 1910.
- Tungsten, which has the highest melting point of any chemical element, was known by Edison to be an excellent material for light bulb filaments, but the machinery needed to produce super-fine tungsten wire was not available in the late nineteenth century.
- Tungsten is still the primary material used in incandescent bulb filaments today.
KB vs KiB
1KB = 1024 bytes 1MB = 1024 KB
1 Kib = 1000 bytes 1 Mib = 10^6 bytesblog comments powered by Disqus