A solar-powered airplane finished crossing the United States on Saturday, landing in New York City after flying over the Statue of Liberty during its historic bid to circle the globe, the project team said. The spindly, single-seat experimental aircraft, dubbed Solar Impulse 2, arrived at New York's John F. Kennedy International Airport at about 4 a.m. local time after it took off about five hours beforehand at Lehigh Valley International Airport in Pennsylvania, the team reported on the airplane's website. Such a pleasure to land in New York! For the 14th time we celebrate sustainability," said the project's co-founder Andre Borschberg on Twitter after flying over the city and the Statue of Liberty during the 14th leg of the trip around the globe. The Swiss team flying the aircraft in a campaign to build support for clean energy technologies hopes eventually to complete its circumnavigation in Abu Dhabi, where the journey began in March 2015. The solar cr...
Johan August Arfwedson was born on January 12, 1792 in Sweden. He belonged to a wealthy bourgeois family.How was Lithium Discovered?
The first cues of lithium existing dates back to the year 1800.
De Andrada, a famous scientist and statesman was visiting Scandinavia. During his trips, he came across a new mineral. Not being sure about what it was, he called it as mineral petalite. Scientists all over the world were not convinced that this material was some kind of mineral. People started studying this thing.
Johan August Arfwedson also started analyzing the mineral petalite. In his study, he found that 10 per cent of the mineral was some other substance. He came to a conclusion that the missing mineral was totally different. He decided to name it as "lithium". Lithium derives from the Greek word lithos which means a stone.
So, the next time you come across any mobile phone battery or ball bearings of any huge machinery, you remember whom you need to be thankful to.
Lithium is a soft and silvery metal. Besides the battery, lithium is used to make black and white television tubes. It is also mixed with lead and an alloy of lead and lithium is used widely to make the tough ball bearings of machinery. Lithium is also used in the production of aluminium and ceramic items. Lithium is added to glass during the production of any glass item to make it strong.
With so many varied uses, life seems so impossible without lithium. We need to owe the credit to the famous Johan August Arfwedson who discovered this important metal.
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