Why do we yawn

Published on in category Health
Why do we yawn The answer to the question why we yawn is not entirely clear. One theory states that yawning oxygenates the brain, and another that it cools the brain. Recent research tends to lean towards the second variant. The brain works better and falls asleep. Read more

Why does the comet have a tail

Published on in category Physics
Why does the comet have a tail The tail of a comet is technically called a coma and is the vapor of the outer ice layer, which evaporates with heating as the comet approaches the Sun. The solar wind causes the coma to always point away from the Sun. The tail glows due to the fluorescence of these gases. Read more

Why was Jan Hus burned

Published on in category History
Why was Jan Hus burned As a reformer of the Roman Catholic Church, Jan Hus was a great critic of it. He especially criticized the moral decline of the church and preached his teachings to the general public. His role model was the English philosopher and theologian John Wycliffe. Read more

Why does the fluorescent lamp flash

Published on in category Technology
Why does the fluorescent lamp flash This question depends on how it flashes. Based on principle of its function, every fluorescent lamp flashes. Without electrical ballast twice the mains frequency, i.e. 100x per second. With the ballast then normally in tens of kHz, i.e. 10000x per second. Read more

Why the Internet was created

Published on in category Technology
Why the Internet was created The first impetus for the emergence of the Internet was the Cold War between the Soviet Union and the United States. Specifically the successful launch of the Soviet Sputnik 1 spacecraft in 1957. The Soviets had a certain lead in the field of technological struggle and the Americans did not want to lag behind. Read more