😳WHY❓❓❓
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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
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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.
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BORN TODAY 🐣💐
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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.
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IDIOMS & PHRASES
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Burn your boats/ bridges*
Doing something that makes it impossible to go back to the original state. =======================
ANTONYMS
Forsake× Hold,
maintain
SYNONYMS
Forsake :desert,
renounce
🧬 *HEALTH CARE: HOME REMEDIES*🩺
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Guava is one of the richest sources of dietary fiber. 🍐*
Besides immunity, guava do wonders to skin and also promotes fertility.
Guava also helps in regulating metabolism which leads to weight loss.
Guava extract may help improve blood sugar control in people with diabetes or those at risk.
Taking guava leaf extract daily may help decrease symptoms of painful menstruation, including cramps.
Consuming guavas or guava leaf extract may prevent or reduce diarrhea and constipation.
The antioxidants and vitamins in guavas can help slow down the aging of your skin, while guava leaf extract may help treat acne.
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Ms. Pooja, |
