Nikola Tesla discovered the rotating magnetic field, which is the basis of most alternating current machinery. He also contributed to the development of the alternating current electrical system that is widely used today.
Tesla's interest in electrical invention was spurred by his mother, Djuka Mandic, who invented small household appliances in her spare time while her son was growing up. After completing his education, Tesla moved to Budapest, where for a time he worked at the Central Telephone Exchange.
In 1884 Tesla arrived the United States with a letter of introduction to Thomas Edison, who hired Tesla. The two worked tirelessly alongside each other to improve Edison's inventions. However, the two parted ways after a few months due to a conflicting business-scientific relationship.
His luck changed in 1887, when he was able to find interest in his AC electrical system and funding for his new Tesla Electric Company. Setting straight to work, by the end of the year, Tesla had successfully filed several patents for AC-based inventions. Tesla continued his work and patented several more inventions during this period, including the "Tesla coil," which laid the foundation for wireless technologies and is still used in radio technology today.
Tesla also discovered, designed and developed ideas for a number of other important inventions – most of which were officially patented by other inventors – including dynamos (electrical generators similar to batteries) and the induction motor. He was also a pioneer in the discovery of radar technology, X-ray technology, remote control and the rotating magnetic field – the basis of most AC machinery. After suffering a nervous breakdown, Tesla eventually returned to work, primarily as a consultant. But as time went on, his ideas became progressively more outlandish and impractical. Nikola Tesla died on January 7, 1943, at the age of 86, in New York City, where he had lived for nearly 60 years. But the legacy of the work he left behind him lives on to this day.
23 April, 1968: 1st decimal coins were issued in Britain (5 & 10 new pence, replacing shilling and two-shilling pieces).
24 April, 1800: The Library of Congress was established in Washington, D.C. It is America's oldest federal cultural institution and the world's largest library.
25 April, 1982: Bell labs announced the 1st solar battery made from silicon. It has about 6% efficiency.
26 April, 1994: Multiracial elections were held for the first time in the history of South Africa. With approximately 18 million blacks voting, Nelson Mandela was elected president and F.W. de Klerk vice president.
27 April, 1865: On the Mississippi River, the worst steamship disaster in U.S. history occurred as an explosion aboard the Sultana killed nearly 2,000 passengers, mostly Union solders who had been prisoners of war and were returning home.
28 April, 1920: Azerbaijan joins the Soviet Union.
Dr. Elwin Ranson, a Cambridge philologist, is on a walking tour of England when by chance he knocks on the door of an old (and unpopular) ex-schoolfellow’s cottage. He is drugged and kidnapped by the man, Devine, and his accomplice, Professor Weston, who has discovered the secret of space flight.
They set off for Mars in Weston’s rocket, and during the journey Ransom wakes to hear that he is to be offered to the inhabitants, the sorns, as a sacrifice. He manages to escape and encounters Hyoi, one of the otterlike hrossa, who take him in. He learns that they are one of three intelligent species on the planet, which they call Malacandra: the hrossa, the pfifltriggi and the seroni (sorns), who cooperate peacefully under the guidance of the ethereal Oyarsa.
After Hyoi is killed by Weston and Devine, it is decided that Ransom should go to the Oyarsa. Like much of Lewis’ work, believe is a major theme. The Oyarsa is similar to an archangel, and explains to Ransom that each of the inhabited planets in the solar system has its own Oyarsa, but the one who governed the Earth went to the bad and that is what has caused all the evil on the planet. The Malacandrans know it as the silent Planet, and allow such evil people as Weston and Devine to exist. Lewis’ main theme is the difference between good and evil, but unlike the other two books in the series, it never gets preachy. The descriptions of the Malacandrans and their planet are beautifully written, and despite some long philosophical discussions, the story is well-paced and enthralling.
Like the flags of Colombia and Venezuela, that of Ecuador is based on the flag of Francisco de Miranda and Simon Bolivar, whose independence movement was responsible for liberating South American from the rule of imperial Spain. Ecuador was united with Colombia and Venezuela in Gran Colombia in 1822, but Ecuador left the federation eight years later. It was ultimately decided that the same colours as the Colombian flag should be retained. The addition of the arms to the centre of the basic civil flag gives the state flag. The arms depict a scene with Mount Chimborazo, the highest mountain in the country, in the background, and a ship on a river in the foreground, symbolizing trade. A yellow sun of independence is surrounded by four zodiac signs representing the months March-June of 1845, when Ecuador successfully defended its independence. A South American condor above symbolizes freedom, while an axe and fasces below represent the authority of the republic.
1. Where is the world’s longest golf course located?
2. How many holes does a typical Golf course consists of?
3. What do you call 3 shots under par on a hole?
4. What do you call 3 shots over par on a hole?
5. Where is the world’s highest golf course located?
6. How many dimples are there on an ideal gold ball?
7. Who was the first and only female golfer to make the cut at a PGA tour event?
8. Who played golf on the moon?
9. How wide are golf holes?
10. When and where was the world’s first ever golf tournament for women held?
Last week’s answers:
1. Enzo Ferrari
3. The Prancing Horse
4. Michael Schumacher
5. Maranello, Italy
7. 365 P Speciale
10. Ferrari 125S