The Wright Brothers The Wright Brothers, Orville, and Wilbur were two American aviators, inventors, and aviation pioneers of the United States. They are generally credited with inventing and building the world’s first practical airplane and making the first human flight on December 17, 1903. They made the …
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From refraction of the sun’s rays during rain The rainbow is a natural phenomenon consisting of a spectrum of colors. A person standing on Earth sees the sun as a disc with a particular size and shape – a circle. When you look at it from underwater, …
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Autumn season is derived from the Latin word “autumnus” which means Autumn (season). It is the Autumn season of the year between summer and winter. The leaves fall off trees at this time of year because of shortening day length and decreasing temperature. …
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To protect passengers in case of an accident Airbags on a car work as shock absorbers; they reduce the damage caused to passengers when in an accident. The airbag consists of a rigid plastic bag connected to an inflating mechanism that includes a compressed gas tank. The …
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Siberia, Russia The coldest temperature recorded in the Northern Hemisphere was −68.0 °C (−90.4 °F) at a Soviet military base on January 31, 1933. The coldest permanently inhabited place is Oymyakon, Russia, where temperatures have been known to reach −71.2 °C (−96.2 °F). It is …
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