---------- Forwarded message --------- From: 'N Sekar' via iyer123 <[email protected]> Date: Tue, Jan 30, 2024, 9:17 PM Subject: [iyer123] Re: [KeralaIyers] CULTURAL QA 01-2024-30A To: <[email protected]>, Iyer <[email protected]>, Gopa4411 <[email protected]>
Thanks. Like you said Q 1 answer was very interesting and informative. Q 5 joke was very good. Hearing it for the first time. N Sekar Sent from Yahoo Mail on Android <https://mail.onelink.me/107872968?pid=nativeplacement&c=Global_Acquisition_YMktg_315_Internal_EmailSignature&af_sub1=Acquisition&af_sub2=Global_YMktg&af_sub3=&af_sub4=100000604&af_sub5=EmailSignature__Static_> On Tue, Jan 30, 2024 at 8:33 PM, 'gopala krishnan' via KeralaIyers <[email protected]> wrote: *CULTURAL QA 01-2024-30A* *All the BELOW QA are from Quora digest to me on 30-01-2024.* * Quora answers need not be 100% correct answers * *.Compiled* *and posted by R. Gopala krishnan, on 30-01-2024* *Q1 How did talking birds like parrots evolve?* *A1 Silk Road, AI Expert Mon* *First of all, let's get one thing straight: birds are **dinosaurs. **Yep, you heard me right.* *Birds are the living descendants of a group of small carnivorous dinosaurs called theropods that lived in the Late Jurassic period, about 150 million years ago.* *These theropods had feathers, but not for flying**. They used them for insulation, camouflage, display, and maybe even gliding.* *One of these feathered theropods was Archaeopteryx, the first known bird.**It had wings and a wishbone, but also teeth and a long bony tail. It was a transitional form between reptiles and birds.* *How did these theropods become birds? And how did they learn to sing?* *Well, it turns out that there are two main factors involved: natural selection and sexual selection.* *Natural selection is the process by which organisms adapt to their environment and survive better than others.* *Sexual selection is the process by which organisms attract** mates and reproduce more than others.* *Natural selection favored theropods that could fly, because flying gave them an advantage in escaping predators, finding food, and exploring new habitats.* *To fly, they needed lighter bones, stronger muscles, and more efficient lungs and hearts.They also needed more complex brains to coordinate their movements and navigate in three dimensions.These changes made them more bird-like over time.* *Sexual selection favored theropods that could sing, because singing gave them an advantage in attracting mates, defending territories, and communicating with each other.* *To sing, they needed a special organ called the syrinx, which is located at the base of the trachea (windpipe).The syrinx can produce complex sounds by vibrating thin membranes that are controlled by muscles.* *They also needed more flexible brains to learn and** memorize songs and sounds. These changes made them more vocal over time.* *Understand, not all birds can talk like parrots**. That's because parrots belong to a group of birds called psittaciformes, which have some unique features that make them especially good at vocal learning.* *Vocal learning is the ability to modify sounds based on** experience and social interactions.* *It is rare in animals and only found in a few groups, such as humans, whales, dolphins, elephants, bats, and some rodents.* *Parrots have a large brain relative to their body size, and a* *high density of neurons in their forebrain.They also have a direct connection between their motor cortex (which controls movement) and their brainstem (which controls the syrinx).This allows them to precisely control their vocalizations and imitate sounds they hear.* *Parrots also have a long lifespan and a complex social structure, which give them more opportunities to learn from each other and from humans.* *MY NOTE- Very informative answer**.* *Q2 Do you know a joke about an elderly couple?* *A2 Andras Lu, Sep 12* *An elderly couple had dinner at another couple's house, and after eating, the wives left the table and went into the kitchen. The two gentlemen were talking, and one said, “Last night we went out to a new restaurant and it was really great. I would recommend it very highly.”* *The other man said, “What is the name of the restaurant?”* *The first man thought and thought and finally said, “What is the name of that flower you give to someone you love? You know, the one that's red and has thorns.”* * “Do you mean a rose?”* * “Yes, that's the one,” replied the man. He then turned towards the kitchen and yelled, “Rose, what's the name of that restaurant we went to last night?”* *Q3 Was Beethoven really blind and deaf? How did he write music?* *A3 Silk Road, AI Expert10h* *Beethoven was not blind.** But he was deaf.* *He started losing his hearing when he was about 28 years old, which was around 1798.He noticed that he had trouble hearing high-pitched sounds and that his ears would ring constantly. He also had severe headaches and stomach problems.He tried all kinds of treatments, like baths, herbs, pills, ear trumpets, but nothing really helped.* *The cause of his deafness is still a mystery and it got worse over time. By 1818, when he was 48 years old, he had to use notebooks to communicate with people**.* *He would ask them to write down what they wanted to say, and he would answer them out loud or write back.* *He also wrote down his thoughts and feelings in these notebooks, which are called conversation books.* *By 1824, when he was 54 years old, he was almost completely deaf. He could no longer hear speech or music normally.* *He could only feel the vibrations of the instruments or his own voice.That's why he had to be turned around to see the applause when he conducted the premiere of his Ninth Symphony, which is one of his most famous works.* *But even though he was deaf, he never stopped making music.**He used his memory and imagination to create sounds in his mind.* *He also used a special device called a resonator, which was a wooden rod that he attached to his piano and bit with his teeth.This way, he could feel the vibrations of the notes through his jawbone.* *He also wrote down his music very carefully, using different symbols and instructions to indicate the dynamics, tempo, articulation, and expression of the music.* *He even wrote down the pitch range of each instrument and voice part, so that he could make sure they were balanced and harmonious.He composed some of his best works after he became deaf, like the late string quartets, the Missa Solemnis, and the final piano sonatas.* *These works are very complex and innovative, showing his mastery of musical forms and styles.They also express his emotions and ideas very powerfully, showing his struggle with his deafness and his faith in humanity.Despite his deafness, or maybe because of it, he created some of the most beautiful and inspiring music ever.* *Q4 What is something electrical engineers know that others don't?* *A4 Hitesh Mohan,6 years of experience as an electrical engineer Jan 12* *A fallen power transmission line is extremely dangerous* *Whenever we encounter a fallen power transmission line or live wire, there is a tendency to approach it. Some people mistakenly believe that it poses no harm as long as they don't touch the wire, but this assumption is incorrect. * *It is always better to maintain a distance of **8m to 10m **from a fallen power line **because even though you are not physically touching it, **a fallen power line can still electrocute you.* *When a fault or accident occurs in a high-voltage system and if the overhead transmission line makes contact with the ground, it can create a voltage gradient in the ground in the form of ripples. As shown below :-If a person's feet are at different points along this gradient, a potential difference can exist between their feet.* * This potential difference can result in a current flowing through the person's body, potentially leading to electric shock and death of a person**. This phenomenon is called as Step Potential* *To avoid electric shock when encountering a fallen transmission line, maintain a distance of 6 to 8 meters from the power line. Alternatively, keep your feet as close together as possible to prevent the creation of a potential difference between them.* *Never touch or go near an electrical fence:-* *If a person comes into contact with a conductive object (such as a fence or equipment) that is at a different potential due to a ground fault, there is a potential for electric shock as shown in the above image. This is called as touch potential. Touch potential is concerned with the voltage difference between the point of contact and the ground at a different potential. It may cause severe damage to Your body.* *Both Step & Touch potentials are Potential Hazards for the human body.* *My note- Though what is told is a simple fact, I don’t recollect studying about touch potential in the Bsc **study. I don’t know it is fading memory at 80, what is studio in 20’s. **However we must wear **non earthing foot wear **and grading potential will not much effect us. However if we see a bare ware from electric pole has fallen on earth, if not wearing non earthing footwear,**we must keep our feet as close as possible. Non earthing footware is a dry footwear and not having any nails fitted on it. Only pastes. * *Q5 What are some funny mathematics jokes?* *A5 Sundararajan Seshadri, Love Mathematics6h* *I came across this joke a few decades back. Sorry, if it is already posted.* *A technician was given a problem: a nail was driven fully in a wall**. He had to remove the nail. He scooped the material around the head and got some hold on the nail head. Using a pliers, he pulled the nail out.* *The same problem was given to a mathematician but this time, the nail was not driven fully in**. The nail head was exposed with some body portion outside the wall. The mathematician was aware of the technician’s solution. He thought for a minute and then drove the nail fully in. And he declared: ‘Now the problem has been converted to a standard one the solution for which already exists!’* -- On Facebook, please join https://www.facebook.com/groups/keralaiyerstrust We are now on Telegram Mobile App also, please join Pattars/Kerala Iyers Discussions: https://t.me/PattarsGroup Kerala Iyers Trust Decisions only posts : https://t.me/KeralaIyersTrust Kerala Iyers Trust Group for Discussions: https://t.me/KeralaIyersTrustGroup --- You received this message because you are subscribed to the Google Groups "KeralaIyers" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. 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