Mr G gets wild but also thinks makes an interesting reading , straining himself etc; but forgets to check whole facts; unfortunately I read a lot including the author real astrophysicist Degrasse whose answer is the right one. Space has generally no temperatures or so hot or so cold only as particles @ waves and vacuum is at a distance. Thus only radiation is wrong. Those interested may go through so that no one need to know better Thank You KR IRs 12423 A1 *How cold is space? Physics behind the temperature of the universe Physics Journal USA*
Though sci-fi movies would have us believe that space is incredibly cold — even freezing — space itself isn’t exactly cold. In fact, it doesn’t actually have a temperature at all. Temperature is a measurement of the speed at which particles are moving, and heat is how much energy the particles of an object have. So in a truly empty region space, there would be no particles and radiation, meaning there’s also no temperature. Of course, space is full of particles and radiation to produce heat and a temperature. So how cold is space, is there any region that is truly empty, and is there anywhere that the temperature drops to absolute zero? *HOW STARS ARE HEATING UP SPACE* The hottest regions of space are immediately around stars <https://www.space.com/57-stars-formation-classification-and-constellations.html> , which contain all the conditions to kick start nuclear fusion. Things really warm up when radiation from a star reaches a spot in space with a lot of particles. This gives the radiation from stars like the sun <https://www.space.com/58-the-sun-formation-facts-and-characteristics.html> something to actually act upon. That’s why Earth <https://www.space.com/54-earth-history-composition-and-atmosphere.html> is a lot warmer than the region between our planet and its star. The heat comes from particles in our atmosphere vibrating with solar energy and then bumping into each other distributing this energy. Proximity to our star and possessing particles are no guarantee of warmth, though. Mercury <https://www.space.com/36-mercury-the-suns-closest-planetary-neighbor.html> — closest to the sun — is blisteringly hot during the day and frigidly cold at night. Its temperatures drop to a low of 95 Kelvins (-288 ⁰Fahrenheit/-178 ⁰Celsius). Temperatures dip to -371 ⁰F (-224 ⁰C) on Uranus <https://www.space.com/45-uranus-seventh-planet-in-earths-solar-system-was-first-discovered-planet.html>, making it even colder than on the furthest planet from the sun, Neptune <https://www.space.com/41-neptune-the-other-blue-planet-in-our-solar-system.html>, which has a still incredibly cold surface temperature of -353 ⁰F (-214 ⁰C ). This is a result of a collision with an Earth-sized object early in its existence causing Uranus to orbit the sun on an extreme tilt, making it unable to hang on to its interior heat. Far away from stars particles are so spread out that heat transfer via anything but radiation is impossible, meaning temperatures radically drop. *This region is called the interstellar medium. * The coldest and densest molecular gas clouds in the interstellar medium can have temperatures of 10 K (-505 ⁰F/-263 ⁰C or ) while less dense clouds can have temperatures as high as 100 K (-279 ⁰F/-173 ⁰C). *WHAT IS COSMIC BACKGROUND RADIATION?* The universe <https://www.space.com/52-the-expanding-universe-from-the-big-bang-to-today.html> is so vast and filled with such a multitude of objects, some blisteringly hot, others unimaginably frigid, that it should be impossible to give space a single temperature. Yet, there is something that permeates the entirety of our universe with a temperature that is uniform to 1 part in 100,000. In fact, the difference is so insignificant that the change between a hot spot and a cold spot is just 0.000018 K. This is known as the cosmic microwave background (CMB) <https://www.space.com/33892-cosmic-microwave-background.html> and it has a uniform temperature of 2.7 K (-45⁰F/-270⁰C). As 0 K is absolute zero this is a temperature just 2.725 degrees above absolute zero. The CMB is a remnant leftover from an event that occurred just 400,000 after the Big Bang <https://www.space.com/25126-big-bang-theory.html> called the last scattering. This was the point when the universe ceased to be opaque after electrons <https://www.space.com/electrons-negative-subatomic-particles> bonded to protons forming hydrogen atoms, which stopped electrons from endlessly scattering light and enabling photons to freely travel. As such this fossil relic "frozen in" to the universe represents the last point when matter and photons were aligned in terms of temperature. The photons that make up the CMB weren't always so cold, taking around 13.8 billion years to reach us, the expansion of the Universe has redshifted <https://www.space.com/25732-redshift-blueshift.html> these photons to lower energy levels. Originating when the universe was much denser and hotter than it is now, the starting temperature of the radiation that makes up the CMB is estimated to have been around 3,000 K (5,000° F/2,726⁰C). As the universe continues to expand, that means space is colder now than it's ever been and it's getting colder. *WHAT WOULD HAPPEN IF YOU WERE EXPOSED TO SPACE?* If an astronaut were left to drift alone in space <https://www.space.com/24870-what-is-space.html> then exposure to the near-vacuum of space couldn’t freeze an astronaut as often depicted in science fiction. There are three ways for heat to transfer, conduction, which occurs through touch, convection which happens when fluids transfer heat, and radiative which occurs via radiation. Conduction and convection can't happen in empty space due to the lack of matter and heat transfer occurs slowly by radiative processes alone. This means that heat doesn’t transfer quickly in space. As freezing requires heat transfer, an exposed astronaut — losing heat via radiative processes alone *— would die of decompression due to the lack of atmosphere much more rapidly than they freeze to death.*"Astrophysics for People in a Hurry <https://www.awin1.com/awclick.php?awinmid=8095&awinaffid=103504&clickref=space-us-1261788594342476000&p=https%3A%2F%2Fwww.audible.co.uk%2Fpd%2FAstrophysics-for-People-in-a-Hurry-Audiobook%2FB06X9GZ62F%3FipRedirectOverride%3Dtrue%26source_code%3DM2M30DFT1Bk13010142102TD%26gclid%3DCj0KCQjwn4qWBhCvARIsAFNAMig5XBDnjLPTvfj6VrVfjwhMWpF8c1KHHuDlhMnZaPT27I4j9PQPIXUaAoR0EALw_wcB%26gclsrc%3Daw.ds>(opens in new tab)" by Neil deGrasse Tyson xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx A3 repeated again A4 second numbering: Again I cannot write in detail; what WWW has got to do with the molecule, a cluster of atoms?. A5 So "AJANUBAHU SUSSHIRA :SULALATA SUBIKRAMA:" IS NOT AN EVIDENCE BECAUSE jORDON SAID SO. A6 So sulfa was a breakthrough to Mr G and all the war wounded soldiers of Ramayanam and Mahabharatham were not healed and died because there was no sulpha? A10 why anticipate and yet repeat the same again?. If erraneous why do you say interesting because of gossip nature?. KR IRS 13423 On Wed, 12 Apr 2023 at 18:06, 'gopa4...@yahoo.co.in' via iyer123 < iyer...@googlegroups.com> wrote: > *CULTURAL QA 04-2023-12* > > Q1 Why is space so cold if the heat from the sun has to travel > through space to get here? > > A1 Jail Break, AI expert Mar 26 > > There are three main methods of heat transfer: conduction, convection, and > radiation. > > Conduction and convection both require a medium, like a solid, liquid, or > gas, through which to transfer heat. In space, there is an extremely low > density of particles, as it is mostly a vacuum. This absence of particles > makes conduction and convection ineffective methods for transferring heat > in space. > > The sun's energy, however, reaches Earth primarily through radiation, the > only form of heat transfer that does not require a medium. > > *Electromagnetic waves, such as visible light and infrared radiation, can > travel through the vacuum of space and deliver energy to Earth*. When > these waves reach Earth's atmosphere and surface, they are absorbed by the > gases, water, and land, which in turn become warmer. Some of this heat is > then transferred to the surrounding environment through conduction and > convection. > > The vacuum of space is cold because there are not enough particles to > facilitate significant heat transfer via conduction or convection. At the > same time, the sun's energy can travel through space in the form of > radiation and warm our planet. This explains the apparent contradiction > between the coldness of space and the heat from the sun that reaches Earth. > > My note-Very informative answer. > > Q2 What are some cool smartphone hacks? > > A2 Business Consultant | Digital Marketing Services | IT Guru Mar > 30 > > 1. Use your smartphone as a magnifying glass: If you need to read small > text or see small details, you can use your smartphone's camera to zoom in > and magnify the image. Simply open your camera app and zoom in on the > subject you want to see. > > 2. Take a screenshot with a swipe: Instead of pressing the power button > and volume down button, you can take a screenshot on some smartphones by > swiping your palm across the screen. This can be a faster and easier way to > capture an image. > > 3. Customize your home screen: You can customize your smartphone's home > screen by changing the wallpaper and rearranging the apps. You can also > create folders to organize your apps by category or theme. > > 4. Use voice commands: Many smartphones have voice assistants, such as > Siri, Google Assistant, or Bixby. You can use voice commands to perform > tasks such as setting reminders, sending messages, making calls, or > searching the web. > > 5. Extend your battery life: To extend your smartphone's battery life, > you can turn off features such as Wi-Fi, Bluetooth, and location services > when you're not using them. You can also adjust the brightness of your > screen and close apps that are running in the background. > > 6. Use your smartphone as a remote control: Many smartphones have an IR > blaster that allows you to control your TV, cable box, or other devices. > You can download an app that turns your smartphone into a remote control > and use it to change channels or adjust the volume. > > My note- I have seen a person doing so, after breaking of the TV remote. > > 7. Turn on "Developer Options": If you're an advanced user, you can turn > on "Developer Options" in your smartphone's settings to access advanced > features and settings. This can be helpful for tweaking performance or > customizing your smartphone. > > *Overall, there are many cool tricks and tips that you can use to get the > most out of your smartphone*. By exploring the features and settings of > your device, you can discover new ways to use it and make it work for you > > Q3 What facts about Japan do foreigners not believe until they > come to Japan? > > A3 Mark Rhysand, Anthropology Studies (2020–present) Mon > > Vending machines are everywhere: Japan is famous for its vending > machines, which can be found on nearly every street corner. *These > machines sell everything from drinks and snacks to hot meals and even > clothing.* > > It is extremely safe: Japan consistently ranks as one of the safest > countries in the world, with low crime rates and a strong sense of > community. > > There are more elderly people than children: Japan has one of the oldest > populations in the world, with more elderly people than children. > > The trains are incredibly punctual: Trains in Japan are known for their > punctuality and efficiency, with delays of even a few minutes considered > unacceptable. > > The toilets are high-tech: Japanese toilets are often equipped with > high-tech features such as heated seats, built-in bidets, and even sound > effects to mask any embarrassing noises. > > There are themed restaurants and cafes: Japan is home to a wide variety > of themed restaurants and cafes, including maid cafes, cat cafes, and even > a ninja-themed restaurant. > > It is common to wear masks: Wearing masks to prevent the spread of > illness is a common practice in Japan, even outside of flu season. > > There are no public trash cans: Public trash cans are not common in > Japan, as people are expected to take their trash with them and dispose > of it at home. > > My note- I think carrying trash with them and dispose at home can be not > so comfortable like used napkins. They must be disposed immediately > > There are vending machines for almost anything: In addition to drinks and > snacks, Japanese vending machines can also dispense items such as > umbrellas, batteries, and even live crabs. > > You can experience all four seasons: Japan has a temperate climate with > four distinct seasons, offering visitors the chance to experience cherry > blossom season in the spring, beach season in the summer, autumn foliage in > the fall, and winter sports in the snowier regions. > > Q4 Why are motorcycles so much louder than cars or buses? Why > can’t the noise be reduced? > > A4 Digital Services And Products, CEO, Motivational Speaker & > Online Entrepreneur at Freedom Guider (2019–present)Mar 28 > > Motorcycles are significantly louder than cars or buses due to a number of > factors. > > *Firstly, motorcycles typically have smaller and more compact engines, > which means that they generate a much higher power-to-weight ratio than > cars or buses.* This higher power output results in more noise as the > engine revs higher and produces more exhaust gases. > > *Additionally, many motorcycles are designed with straight pipes or > aftermarket exhaust systems,* which bypass the muffler and catalytic > converter. This means that the exhaust gases are released directly into the > atmosphere without any filtration, resulting in a much louder sound. > > Another factor contributing to the loudness of motorcycles is the design > of their engines. Motorcycles often have high-performance engines that > are designed to rev much higher than car engines. This high revving creates > a distinctive sound that is much louder than the lower-pitched sound of car > engines. > > While some motorcyclists may argue that the loudness of their bikes is a > matter of personal preference or safety, there are many people who find > the noise to be a nuisance. Excessive motorcycle noise is a significant > contributor to noise pollution in urban areas, and can be especially > disruptive during the night when people are trying to sleep. > > There are a few ways to reduce the noise generated by motorcycles. One > option is to install a muffler or aftermarket exhaust system that is > designed to reduce noise levels. > > Another option is to use noise-cancelling technology in helmets or > earplugs to reduce the impact of the noise on the rider. > > However, the most effective way to reduce motorcycle noise is through > regulation and enforcement. Many cities and towns have noise ordinances > that limit the amount of noise that motorcycles can produce, and law > enforcement agencies can issue fines or citations to riders who violate > these regulations. > > In conclusion, motorcycles are louder than cars or buses due to the design > of their engines, exhaust systems, and the fact that they are often > ridden at higher speeds. While there are some ways to reduce the noise > generated by motorcycles, the most effective solution is through regulation > and enforcement of noise ordinances. > > Q4 When people invented the worldwide web, did they not realize > that every molecule will be turned over? > > A4 Matt Riggsby, MA Archaeology, Boston University Mon > > No. Very much no. > > I was an early adopter of the web back in 1993, and at the time, nobody > had the slightest idea. *The technological infrastructure which has made > the internet what it is today did not exist,* nor were the cultural > implications apparent. The internet was still very much a tool for > academics and IT professionals; you had to be a dedicated geek to be > involved with it. > > *Computers were mostly large desktop devices, with laptops just starting > to make a dent in their sales.* Smart phones were more than a decade away > and even cell phones weren’t particularly common; they were brick-sized > devices with a reputation for being used by people who carried them to make > themselves look rich and important and not something anybody expected to be > adopted on a large scale. > > We were still years away from practical consumer digital cameras (and the > ones which existed ate batteries like you wouldn’t believe), let alone > practical digital video. People created directories of web sites by hand > because there were no search engines. Indeed, nobody had invented web > crawlers to index sites to make them available for searching. Naturally > there were no social media sites; that was famously the next generation of > the web. And the internet had yet to be commercialized. There were no > web-facing businesses, no news networks providing updates that way, and > while it may be difficult for Those Kids Today (tm) to understand, the very > idea of advertising over the internet was controversial at the time. > > The first notable internet marketing campaign didn’t happen until 1994, > after the first web browser came out, when a law firm spammed a bunch of > NNTP groups (look it up) offering services to help get green cards, and a > lot of people were very upset about it at the time. > > All of that stuff was necessary to make the web what it is today: > ubiquitous computing (in the form of smart phones), tools to locate and > share information, the ability to produce easy-to-access media, > institutional backing for information sharing, and a cultural climate > tolerant of all of the above. These were simply things which did not exist > at the time Tim Berners-Lee created the necessary protocols for web pages, > nor was there any particular reason to foresee them, let alone the cascade > of related cultural changes. > > Q5 What is the evidence for the existence of giant humans? Are > there any fossilized remains or bones of these beings? If so, where are > they located and what do they tell us about our past? > > A5 Claire Jordan, Degree in biology and folklore; programmer, > shop owner, secretary on newspaper Mar 29 > > The maximum survivable height for humans seems to be around 8ft, and > there’s no evidence of ancient humans ever being taller. > > However, when you read stories about ancient human giants, you have to > remember that up until about 500 years ago, it was perfectly normal to > regard other great apes as exotic types of human. > > There was a species of early orang utan called Gigantopithecus blacki > which we think (we only have partial remains) was up to 12ft tall when > standing upright, and a few may well have survived for long enough for > early humans to have met and remembered them. > > Q6 What have been the greatest breakthroughs in medicine? > > A6 Petey, writer, gardener, painter, pulmonary-critical care MD > Mar 23 > > The discovery of sulfa as the first antimicrobial drug > > In 1914, during World War I, a German soldier named Gerhard Domagk was > badly wounded in a battle. He was transported to a rural hospital and > recovered. *There, Domagk was trained as a medical orderly. Domagk always > had an interest in medicine. He had enrolled in a medical program at Kiel > University before the war broke out.* > > At the hospital, Domagk assisted the surgeons with surgeries. He noted > that, while the surgeons could sew people back together, the patients > would succumb to wound infections days later. This experience inspired > him to work on the treatment of wound infections. *When the war ended, he > returned to Kiel and finished his medical course. He became a researcher in > bacteriology. By the late 1920s, he joined IG Farben, a German chemical > company to lead their institute of experimental pathology.* > > Domagk worked with chemical dyes to stain bacteria under the microscope. He > hypothesized that if a dye could attach itself to a bacteria, it could be a > vehicle to deliver poisons to kill it. For 5 years, Domagk tested many > azo dye compounds at IG Farben. One of the dyes was Prontosil, a chemical > with a sulfa side chain. Prontosil was successfully tested in mice. > Domagk published his discovery in early 1935, though the mechanism of > action was not clear to him. > > In December 1935, Domagk’s 15-year-old daughter, Hildegarde, injured her > hand with a stitching needle. The wound became infected. After many > incisional drainage procedures, the surgeon recommended amputation. *Domagk > used Prontosil to treat the infection, and Hildegarde’s limb and life were > saved.* > > In 1936, Ernest Fourneau figured out how Prontosil worked. He discovered > that it was a pro-drug. It is metabolized in the human body to > Sulfanilamide which is the anti-bacterial active agent. Because > Sulfanilamide and its derivatives were readily available as chemical > compounds, what subsequently followed was a sulfa craze. Manufacturers > produced various forms of sulfa for antimicrobial purposes. > > Until it was replaced by Penicillin and Streptomycin almost 10 years > later, sulfa was the only antimicrobial available and it saved many lives. > > Domagk received a Nobel Prize for his discovery of sulfa in 1939. > > My note- I recollect using sulfa powder came in white plastic tin for > treating of injuries. Perhaps it may be still there in same form now also. > > Q7 Why are South Korea and Japan so prosperous, but the > historically US-backed South American regimes so poor? > > A7 Alex Piascik, Studied at State University of New York at > Fredonia2y > > I’ll focus on South Korea because their story is even more dramatic than > Japan’s, although both countries employed a very similar strategy. > > South Korea literally rose from the ashes to become one of the richest > countries in the world today. In 1955 their per-capita GDP was $64; today > it’s around $30,000, an increase of almost 500-FOLD. > > They went from this(HUTS) To this in a single generation: Sky scrappers > > How? > > The answer lies with the chaebols, family-run conglomerates that dominate > the South Korean economy. *In the U.S. and Europe we’re all familiar with > Samsung phones and Hyundai cars, but within S. Korea itself these companies > reach into every corner of day-to-day life.* > > Let’s look at Samsung, the most famous chaebol that makes up almost 15% of > South Korea’s economy. > > *You can get a university degree at Samsung-affiliated Sungkyunkwan > University*, then get a job at Samsung and move into your new apartment > at Samsung Tower Palace which is equipped with a Samsung-manufactured home > security system, air conditioner, TV, refrigerator, oven and microwave. > When you get sick you can get treated at Samsung Medical Center in the > Gangnam district in Seoul. When you want to get married you can do so at a > Samsung-owned venue, and when it’s time to retire you can go to a Samsung > retirement home. When your time is up, your funeral arrangements can be > handled by a Samsung funeral parlor. > > The chaebols expanded their influence during the Park Chung-hee era. Park > was a military dictator who ruled South Korea from 1961 until his > assassination in 1979. The companies were designated for special treatment > by the government in order to jump start industrialization and modernize > South Korea’s economy. A number of strategies were employed: the firms were > protected from foreign competition through tariffs, and given loan > guarantees which enabled them to invest and build new factories. *Government > economic policy favored exports in order to gain foreign capital for > further investmen*t. Over time, repeated investment enabled the chaebols > to move up the value-added chain, producing more complex, sophisticated > products that enabled these companies to then compete directly with their > American and European competitors. > > You can see this most easily with cars. Early Korean imports from Hyundai > and Kia were in the low-end segments of the market, compacts and mid-sized > sedans. An obsessive focus on reliability enabled them to gain new > customers, and supply chain efficiency made them profitable in a low-margin > segment of the market. As they got better they started to compete in the > more profitable, upper end of the market: SUV’s, luxury sedans and hybrids. > > This symbiotic relationship between government and business, coupled with > the insane work ethic of the Korean people, is what transformed South Korea > into the country we know today. > > The U.S. contribution to this was military. By providing protection > through the U.S. / South Korea Mutual Defense Treaty, South Korea was > shielded from external threats and given the stability needed for the > country to develop. But the bulk of the credit has to go to the Korean > people and their leaders, including Park, a brutal dictator who > nevertheless set the stage for the remarkable rise of the chaebols. > > Bottom line: the nations of South America have not done as well in > marshaling their people and resources. Poor political leadership, lack of > coherent strategy in economic policy, corruption, the drug trade, > inadequate resources devoted to education are all factors that come into > play. Compare this to South Korea: ALL of South Korean society, beginning > in the 1950’s, focused like a laser beam on one goal, creating a prosperous > society. The nations of South America…didn’t. > > *There are downsides to the Korean strategy that are* causing a great > deal of suffering among her people, which is why many young S. Koreans > refer to their country as “Hell Joseon” (Joseon was an ancient dynasty that > ruled the Korean peninsula until the late 19th century). *The competitive > pressures of South Korean society have created one of the highest suicide > rates in the world and a rate of poverty among the elderly of almost 50%.* > > So while the people of South America may not be as materially prosperous, > they don’t live in a pressure cooker society where everyone is constantly > being pushed to succeed and looked down upon if they don’t. > > Q8 Can you sleep in an airport if you just arrived and don't have > a flight the next day? Is it safe, and is it even allowed? > > A8 Monika Sharma, Mon > > Sleeping in an airport when you have just arrived and do not have a flight > the next day is generally not recommended. > > Most airports do not allow passengers to stay overnight. Also, it may not > be safe to sleep in public areas due to security concerns. If you need to > rest after a long flight, it's best to book an airport hotel or find > alternate accommodation nearby. > > Most airports have designated lounges or sleeping areas where you can rest > for a fee, which may be a more comfortable and safe option. > > Q9 Does the Indian Railway really need to increase more general > compartments for a long-distance train? > > A9 Prashant Tiwari, Indian Railways Enthusiast Updated 3y > > Rather than increasing more general coaches, *Indian Railways should work > on Antyodaya trains. These type of trains are fully unreserved superfast > trains with limited stops.* > > *Indian Railways introduced 12 Antyodaya trains but only few of them are > running with 100% occupany.* These trains should be introduced in the > state of Bihar and Uttar Pradesh connecting Mumbai and New Delhi via > different routes because trains originating from these two states are > overcrowded. > > *To earn money Railway can remove those 3–4 general coaches from > mail/express trains and replace them with reserved coaches* > > A dozen of 24 coached Antyodaya Express for both states will be a game > changer and rush on these routes will be cleared easily . > > Traffic on tracks is a problem but it can be managed by introducing trains > via different routes so that only one route will not face all the load . > > Q10 What are some mind blowing facts about China? > > A10 Mark Rhysand, Studies philosophy, humanities, anthropology and > metaphysics Mon > > *The world's largest building, the New Century Global Center in Chengdu, > China, covers an area of 18.9 million square feet* and contains a water > park, shopping mall, hotel, and offices. > > China is home to over 1,500 species of animals that are found nowhere > else in the world, including the giant panda, Chinese alligator, and > Chinese pangolin. > > The ancient Chinese were using fossil fuels such as coal and natural gas > for heating and cooking over 2,000 years ago. > > The Chinese invented paper over 2,000 years ago and also developed the > first printing press using moveable type over 1,000 years ago, long before > it was invented in Europe. > > China's Gobi Desert, which covers over 500,000 square miles, is the > third-largest desert in the world and contains many important dinosaur > fossils. > > ***The Chinese invented gunpowder over 1,000 years ago and were the first > to use it in warfare, giving them a significant military advantage. > > My note- *** This also I have answered in middle school question paper. > > The Chinese language has over 50,000 characters, although only around > 20,000 are in common use today. > > China's Hukou system, which dates back to the 1950s, restricts citizens' > access to social welfare and other services based on their place of birth > and residence. > > The Chinese government operates the world's largest censorship system, > known as the "Great Firewall," which blocks access to many foreign > websites and social media platforms. > > The ancient Chinese were using umbrellas over 2,000 years ago, but they > were initially only used by nobility to shield themselves from the sun. > > The Chinese have been using herbal medicine for over 2,000 years, and > traditional Chinese medicine is still widely used today alongside Western > medicine. > > The Chinese government has launched an ambitious plan to become a global > leader in artificial intelligence by 2030, with plans to invest over $150 > billion in the sector. > > *China has the world's oldest continuous civilization, with a history > spanning over 5,000 years.* > > The ancient Chinese practice of acupuncture, which involves inserting > needles into the skin to treat various ailments, has been used for over > 2,000 years and is still widely used today. > > The world's largest urban area, the Pearl River Delta in China's Guangdong > province, has a population of over 42 million people. > > The Chinese word for "crisis" (危机) is made up of the characters for > "danger" and "opportunity," reflecting the idea that a crisis can be both a > danger and an opportunity for positive change. > > China has the world's largest number of internet users, with over 989 > million people online as of 2021. > > The Chinese lunar calendar, which is still used today for traditional > festivals and holidays, dates back over 4,000 years and is based on the > cycles of the moon. > > The ancient Chinese invented kites over 2,000 years ago, and they are > still a popular pastime in China today. > > The world's oldest known fossilized dinosaur eggs were discovered in > China's Guangdong province and are estimated to be over 130 million years > old. > > The Chinese game of Mahjong, which originated in the Qing dynasty over > 200 years ago, is still played by millions of people worldwide. > > The world's largest dam, the Three Gorges Dam on the Yangtze River, is > located in China and can generate over 22,000 megawatts of electricity. > > The Chinese city of Xi'an, home to the famous Terracotta Army, was once > the eastern terminus of the Silk Road and played a key role in the exchange > of goods and ideas between East and West. > > The Chinese character for "peace" (和) is made up of the characters for > "mouth" and "grain," symbolizing the idea that peace is achieved through > good communication and the sharing of resources. > > China has the world's largest high-speed rail network, with over 22,000 > miles of track and trains that can reach speeds of up to 217 mph. > > The ancient Chinese invented the decimal system over 4,000 years ago, > long before it was adopted in the West. > > The Chinese game of Go, which has been played for over 2,500 years, is > more complex than chess and is considered the most complex game in the > world. > > The world's largest radio telescope, the Five-hundred-meter Aperture > Spherical Telescope (FAST), is located in China's Guizhou province and is > the most sensitive radio telescope in the world. > > China's Terracotta Army, discovered in 1974, is the largest burial site > in the world and contains over 8,000 life-size terracotta soldiers and > horses. > > The Chinese language is the most spoken language in the world, with over 1 > billion speakers. > > China's Forbidden City, the imperial palace in Beijing, is the largest > palace complex in the world and has 9,999 rooms. > > The Chinese philosopher*** Confucius, whose teachings are still > influential today, lived over 2,500 years ago and is considered one of the > most important thinkers in Chinese history. > > My note- ***About him also I have studied in middle school. > > The world's longest sea bridge, the Hong Kong-Zhuhai-Macau Bridge, > connects Hong Kong, Macau, and mainland China and spans over 34 miles. > > The Chinese New Year, also known as the Spring Festival, is the largest > annual migration of people in the world, with over 3 billion trips made > each year as people travel home to celebrate with their families. > > My note- As usual I am expecting a big opposing response that Indians are > first in many fields from a member. Let him read the note- The QA in > Quora need not be 100% accurate. > > All the above QA are from Quora website on 12-04-2023 > > *Quora answers need not be 100% correct answers .* > > *Compiled **and posted by R. Gopala Krishnan, 79, former ITS on > 13-04-2023* > > > > -- > You received this message because you are subscribed to the Google Groups > "iyer123" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to iyer123+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/iyer123/1564233012.1919514.1681347985316%40mail.yahoo.com > <https://groups.google.com/d/msgid/iyer123/1564233012.1919514.1681347985316%40mail.yahoo.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Thatha_Patty" group. To unsubscribe from this group and stop receiving emails from it, send an email to thatha_patty+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/thatha_patty/CAL5XZooMP6cBRb89QBAhUpKznsTUf6Cj-fmAEs%2B-KCMibkJy%2BQ%40mail.gmail.com.
