Context and question: The first hydrogen-filled balloon was invented by Jacques Charles in 1783. Hydrogen provided the lift for the first reliable form of air-travel following the 1852 invention of the first hydrogen-lifted airship by Henri Giffard. German count Ferdinand von Zeppelin promoted the idea of rigid airships lifted by hydrogen that later were called Zeppelins; the first of which had its maiden flight in 1900. Regularly scheduled flights started in 1910 and by the outbreak of World War I in August 1914, they had carried 35,000 passengers without a serious incident. Hydrogen-lifted airships were used as observation platforms and bombers during the war.
What year was hydrogen filled balloons invented?
Answer: 1783
Context and question: According to Sadat, it was only when the Israelis cut off the Egyptian garrison at Sharm el-Sheikh that Nasser became aware of the situation's gravity. After hearing of the attack, he rushed to army headquarters to inquire about the military situation. The simmering conflict between Nasser and Amer subsequently came to the fore, and officers present reported the pair burst into "a nonstop shouting match". The Supreme Executive Committee, set up by Nasser to oversee the conduct of the war, attributed the repeated Egyptian defeats to the NasserAmer rivalry and Amer's overall incompetence. According to Egyptian diplomat Ismail Fahmi, who became foreign minister during Sadat's presidency, the Israeli invasion and Egypt's consequent defeat was a result of Nasser's dismissal of all rational analysis of the situation and his undertaking of a series of irrational decisions.
What did Nasser dismiss during the war?
Answer: rational analysis
Context and question: The Space Race was a 20th-century competition between two Cold War rivals, the Soviet Union (USSR) and the United States (US), for supremacy in spaceflight capability. It had its origins in the missile-based nuclear arms race between the two nations that occurred following World War II, enabled by captured German rocket technology and personnel. The technological superiority required for such supremacy was seen as necessary for national security, and symbolic of ideological superiority. The Space Race spawned pioneering efforts to launch artificial satellites, unmanned space probes of the Moon, Venus, and Mars, and human spaceflight in low Earth orbit and to the Moon. The competition began on August 2, 1955, when the Soviet Union responded to the US announcement four days earlier of intent to launch artificial satellites for the International Geophysical Year, by declaring they would also launch a satellite "in the near future". The Soviet Union beat the US to this, with the October 4, 1957 orbiting of Sputnik 1, and later beat the US to the first human in space, Yuri Gagarin, on April 12, 1961. The Space Race peaked with the July 20, 1969 US landing of the first humans on the Moon with Apollo 11. The USSR tried but failed manned lunar missions, and eventually cancelled them and concentrated on Earth orbital space stations. A period of detente followed with the April 1972 agreement on a co-operative ApolloSoyuz Test Project, resulting in the July 1975 rendezvous in Earth orbit of a US astronaut crew with a Soviet cosmonaut crew.
What was the date that the first human reached space?
Answer:
April 12, 1961