First, early in the 11th century, players in France played a sport like this with their hands. It was called “Jeu de Paume”. In the 15th century the players played with rackets. Now it is called “tennis”. It became popular in England and France. King Henry III of France was a big fan of the game. This kind of sport is still played but is known as real tennis ("real" here meaning "royal"). The sport of "lawn tennis" played on grass courts was invented in mid 19th-century England and later spread into many other countries. The name of the sport is usually shortened to "tennis".
There are many different kinds of courts, like grass, clay or hard court. The goal of tennis is to hit the ball over the net into the other player’s court. When the other player cannot return the ball, a point is won. The game is played with two or four people. When it is played with two people, it is called “singles”, and when it is played with four people, it is called “doubles”. The court has "alleys" on each side, which are "fair" territory when playing doubles.
A tennis game has a number of sets. Each set has a number of games, and each game has points. The points are counted love (0, after the French l'oeuf), fifteen (15), thirty (30), and forty (40). If both players get to forty, the score is "deuce" from which 2 more points are needed to win the game. When one player reaches six games, it is one set. If it is a three-set match, the player who wins two sets first is the winner. If the game count reaches 5–5, the set must be won with two more games than the other player, like 7–5 or 8–6. If the game count gets to 6–6, a "tiebreaker" is played. In a tiebreak, players have to get at least seven points while getting two more points than the other player to win the set. In tiebreak points are called “one,” “two,” etc.
There is also soft tennis. Soft tennis is different from regulation tennis. For example, the racket, ball and rules are much different. Soft tennis is popular in Japan. Thousands of people play soft tennis. Tennis is quite a popular sport which lots of people enjoy watching.
There are many different "shots" and "strokes", ways to hit the ball, in tennis. A stroke is the way the body is moved to hit the ball. A shot is how the ball is hit. These include:
Tennis is now a sport that is played at the Olympics. They also have big tournaments like the U.S. Open, Australian Open, French Open and Wimbledon. These four are known as Grand Slam events.
Winning all four Grand Slams in the same year is called a Calendar Slam.
They are the most important tennis tournaments of each season (year). This is because of the world ranking points, tradition, prize-money, and public attention.
Teacher
A teacher is a person who helps people to learn. A teacher often works in a classroom. There are many different kinds of teachers. Some teachers teach young children in kindergarten or primary schools. Others teach older children in middle, junior high and high schools. Some teachers teach adults in more advanced schools (for example, colleges and universities). Some are called professors.
There are different ways of teaching. Most teachers use a variety of methods to teach. Teachers often explain new knowledge, write on a blackboard or whiteboard, sit behind their desks on chairs, help students with their work, or mark students' work. They may use a computer to write tests, assignments or report cards for the class.
Getafe
Getafe is a city 15 km south of Madrid, in the Community of Madrid, Spain. 158,363 people live there. It has great commercial and industrial activity and many mass media. In Getafe there is a university, a military air base, and has a football team in the first division of the Spanish's League.
Manhattan Project
The Manhattan Project was the program based in the United States which tried to make the first nuclear weapons. The project went on during World War II, and was run by the U.S. Army. The head of the project was General Leslie R. Groves, who had led the building of the Pentagon. The top scientist on the project was Robert Oppenheimer, a famous physicist. The project cost $2 billion, and created many secret cities and bomb-making factories, such as a laboratory in Los Alamos, New Mexico, a nuclear reactor in Hanford, Washington, and a uranium processing plant in Oak Ridge, Tennessee.
The Manhattan Project had to find solutions to two difficulties. The first difficulty is how to make the special isotopes of uranium (uranium-235) or plutonium. This process is called separation and is very slow. The United States built very big buildings with three different kinds of machine for separation. They made enough fissionable special isotopes for a few nuclear weapons. The second difficulty was how to make a bomb that will produce a big nuclear explosion every time. A weapon with a bad design can make a much smaller nuclear explosion. This is called a "fizzle". In July 1945, the Manhattan Project solved the two difficulties and made the first nuclear explosion. This test of a nuclear weapon was called "Trinity" and was a success.
The Manhattan Project created two nuclear bombs which the United States used against Japan in 1945.
The Manhattan Project operated under a blanket of tight security. This was to prevent the Axis countries, especially Nazi Germany, from accelerating their own nuclear projects or undertaking covert operations against the project. The possibility of sabotage was always present. At times, people suspected sabotage when equipment failed. While there were some problems believed to be the result of careless or disgruntled employees, there were no confirmed instances of Axis-instigated sabotage. However, on 10 March 1945, a Japanese fire balloon struck a power line, and the resulting power surge caused the three reactors at Hanford to be temporarily shut down.
Maintaining security was difficult because so many people worked on the project. A special Counter Intelligence Corps detachment handled the project's security issues. By 1943, it was clear that the Soviet Union was trying to penetrate the project. Lieutenant Colonel Boris T. Pash, the head of the Counter Intelligence Branch of the Western Defense Command, investigated suspected Soviet espionage at the Radiation Laboratory in Berkeley. Oppenheimer informed Pash that he had been approached by a fellow professor at Berkeley, Haakon Chevalier, about passing information to the Soviet Union.
The most successful Soviet spy was Klaus Fuchs. Fuchs was a member of the British Mission who played an important part at Los Alamos. The 1950 revelation of Fuchs' espionage activities damaged the United States' nuclear cooperation with Britain and Canada. Subsequently, other instances of espionage were uncovered, leading to the arrest of Harry Gold, David Greenglass and Ethel and Julius Rosenberg. Other spies like George Koval remained unknown for decades. People will never know the value of the espionage. One reason was that the Soviet atomic bomb project was held back by a shortage of uranium ore. The consensus is that espionage saved the Soviets one or two years of effort.
Hadschi Baba Scheich
Hadschi Baba Scheich (Haji Baba Sheikh) ("Hecî Baba Şêx" in Kurdish) was the prime minister of the Republic of Mahabad. After the republic was conquered by the Iranian army in 1947 he was the only one who was not hanged together with president Qazi Muhammad at the Chuwarchira Square in Mahabad in 1947. He was immune because of his religious standing. The journalist and lyric Hemin Mukriyani was his secretary during the republic.
Ajam
Ajam (عجم) in Arabic means non-Arabic-speaker. Ajam is an Arabic word that came from Jam the name of a king or prophet according to old story he was the king of world.
The early use of the term included all of the peoples with whom the Arabs had contact including Persians, Pakistanis, Greeks, Ethiopians, and the somewhat related Nabataeans.