🤔 How it works …….. ⁉
How Is Iron Made?
Iron on Earth is made, or more properly extracted, from iron ore. The “rock” portion of iron ore contains oxygen, sands and clays in varying amounts depending on the type of ore.
Today, iron is made by heating hematite or magnetite in a blast furnace along with with a form of carbon called “coke” as well as calcium carbonate (CaCO3), better known as limestone. This yields a compound that contains about 3 percent carbon and other adulterants – not ideal in quality, but good enough to make steel. Every year, about 1.3 billion metric tons (roughly 1.43 billion U.S. tons, or nearly 3 trillion pounds) of crude steel are produced around the globe.
Iron has been known to humankind since about 3500 B.C., or over 5,500 years ago. Its name is derived from the Anglo-Saxon version, which was “iren.” The periodic table iron symbol Fe comes from0 the Latin word for iron, which is ferrum.
😳Why❓❓❓
Why Gold is used in Satilites
Gold is used on connectors and contacts because it has excellent corrosion resistance, high electrical conductivity (only copper and silver are better) and, alloyed with small amounts of nickel or cobalt, has good wear resistance.
Satellites are wrapped in the golden color foils to protect it and its component from the extreme environmental conditions of the space. Most of the components in a satellite which are mostly electronics has to be maintained within a certain range of temperature to keep it working, beyond which the equipment might fail.
Likewise the propellants has to be stored at a particular temperature to avoid its freezing. So this Multilayer Layer Insulation (MLI) provides an enclosure to avoid heat exchange with the outer space which may be at 2.7 K (-270.45 degree C).
You may require active heaters, coolers, Optical solar reflectors and radiators also to get the complete thermal control. MLI’s are basically kapton layer outside and Mylar layer inside. Outside layer is golden in color to provide high reflectivity against solar radiation.
It blocks significant amount of the radiation loads on the parts where radiation loads are undesirable. Inside layer has very low emissivity to minimize the heat leak in any direction. Conduction is the dominant property inside the enclosure to spread heat over the structure.
Gold is used because of its multiple benefits in outer space. … Because of its excellent ability to reflect infrared light while letting in visible light, astronauts’ visors have a thin layer of gold on them to protect their eyes from unfiltered sunlight.
💁🏻♂️ GK TODAY
There are five oceans in the world –
Arctic, Atlantic, Indian, Pacific, and Southern. However, there is only one Global Ocean. The ocean covers about 71% of the surface of the Earth.
BORN TODAY 🐣💐
=================
Sir Henry John Stedman Cotton, (13 September 1845 – 22 October 1915) had a long career in the Indian Civil Service, during which he was sympathetic to Indian nationalism.
After returning to England, he served as a Liberal Party Member of Parliament (MP) for Nottingham East from 1906 to January 1910.
IDIOMS & PHRASES
=================
Burn your boats/bridges
Doing something that makes it impossible to go back to the original state.
 |
Ch Narmada Naveen Kumar |
