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What chemical element is used in the manufacture of glass?
Glass is made from silicon, which is the second most common element in Earth's crust. Actually, silicon is not found in its pure elemental form in nature but rather in various chemical compounds, the most common of which is silicon dioxide, also known as silica.
Glass is made from silicon, which is the second most common element in Earth’s crust. Actually, silicon is not found in its pure elemental form in nature but rather in various chemical compounds, the most common of which is silicon dioxide, also known as silica.
See lessIn what year did the Berlin Wall fall?
The Berlin Wall fell on 9 November 1989 East and West Berliners came together in celebration. The fall of the Berlin Wall was the first step towards German reunification.
The Berlin Wall fell on 9 November 1989
See lessEast and West Berliners came together in celebration. The fall of the Berlin Wall was the first step towards German reunification.
In what year was the League of Nations founded?
The League of Nations officially came into existence on 10 January 1920. On 15 November 1920, 41 members states gathered in Geneva for the opening of the first session of the Assembly. This represented a large portion of existing states and corresponded to more than 70% of the world's population.
The League of Nations officially came into existence on 10 January 1920. On 15 November 1920, 41 members states gathered in Geneva for the opening of the first session of the Assembly. This represented a large portion of existing states and corresponded to more than 70% of the world’s population.
See lessWhat chemical element is used to cool and freeze food?
Liquid nitrogen is used as a commercial refrigerant to flash freeze foods. Nitrogen boils at - 196 0 C .
Liquid nitrogen is used as a commercial refrigerant to flash freeze foods. Nitrogen boils at – 196 0 C .
See lessIn which country did the Chernobyl nuclear disaster take place?
The Chernobyl disaster began on 26 April 1986 with the explosion of the No. 4 reactor of the Chernobyl Nuclear Power Plant near the city of Pripyat in the north of the Ukrainian SSR, close to the border with the Byelorussian SSR, in the Soviet Union.
The Chernobyl disaster began on 26 April 1986 with the explosion of the No. 4 reactor of the Chernobyl Nuclear Power Plant near the city of Pripyat in the north of the Ukrainian SSR, close to the border with the Byelorussian SSR, in the Soviet Union.
See lessWhat instrument is depicted in Leonardo da Vinci's famous painting “The Last Supper”?
Lute is the instrument is depicted in Leonardo da Vinci's famous painting “The Last Supper”.
Lute is the instrument is depicted in Leonardo da Vinci’s famous painting “The Last Supper”.
See lessIn what year did the discovery of Antarctica occur?
January 1820: Antarctica is 'first sighted' by European explorers. The first person to actually see the Antarctic mainland has been debated: in the last week of January, Thaddeus von Bellingshausen reported seeing 'an ice shore of extreme height' during a Russian expedition to the Antarctic.
January 1820: Antarctica is ‘first sighted’ by European explorers. The first person to actually see the Antarctic mainland has been debated: in the last week of January, Thaddeus von Bellingshausen reported seeing ‘an ice shore of extreme height’ during a Russian expedition to the Antarctic.
See lessWhich planet in the solar system is known as the “Morning Star” or “Evening Star”?
Venus appears in the eastern sky before sunrise. Sometimes it appears in the western sky just after sunset. Therefore it is often called a morning or an evening star.
Venus appears in the eastern sky before sunrise. Sometimes it appears in the western sky just after sunset. Therefore it is often called a morning or an evening star.
See lessWhich sea is considered the most salty on Earth?
The Dead Sea has a maximum salinity of 240 per thousand. It has such a high content of salt because it lies in the tropical region which is hot and subsequently the rate of evaporation is high.
The Dead Sea has a maximum salinity of 240 per thousand. It has such a high content of salt because it lies in the tropical region which is hot and subsequently the rate of evaporation is high.
See lessWhat animal is a symbol of peace and neutrality?
Doves, typically domestic pigeons white in plumage, are used in many settings as symbols of peace, freedom, or love. Doves appear in the symbolism of Judaism, Christianity, Islam and paganism, and of both military and pacifist groups.
Doves, typically domestic pigeons white in plumage, are used in many settings as symbols of peace, freedom, or love. Doves appear in the symbolism of Judaism, Christianity, Islam and paganism, and of both military and pacifist groups.
See less