😳WHY❓❓❓
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WHY GOLD IS USED IN SATELLITES..?
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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14 March – Pi Day
On 14 March Pi Day is celebrated around the world. Pi is a symbol used in mathematics to represent a constant. It is the ratio of the circumference of a circle to its diameter which is approx. 3.14
14 March – International Day of Action for Rivers
Every year on 14 March, the International Day of Action for Rivers is observed to raise voice to protect rivers and demand for improving the policies for Rivers. It is a day to educate one another about the threats facing our rivers and to find solutions
BORN TODAY 🐣💐
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Bolly wood Actor Mohammed Aamir Hussain Khan ( born 14 March 1965) is an Indian actor, director, filmmaker and television talk-show host.
Aamir Khan first appeared on screen as a child actor in his uncle Nasir Hussain’s film Yaadon Ki Baaraat (1973).
As an adult, his first feature film role was in the experimental film Holi (1984), He was married to his first wife, Reena Dutta, for fifteen years, after which he married the film director Kiran Rao. He has three children—two with Dutta, and one with Rao through surrogacy
IDIOMS & PHRASES
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Actions speak louder than words
Believe what people do and not what they say.
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ANTONYMS
Sour × Sweet
SYNONYMS
Destiny : Fate
🧬 HEALTH CARE: HOME REMEDIES🩺
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.
https://saachibaat.com/lifestyle/health-fitness/interesting-facts-13-march-2024/
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Ms. Pooja, |
