CULTURAL QA 12-2023-29 All the below QA arefrom Quora DIGEST to me on 29-12-2023.
Selected quora answers generallyinteresting are included .Still they need not be 100%correct answers. Compiled and posted by R.Gopala Krishnan, 80, on 29-12-2023. Q1 Howdid dinosaurs come into earth? A1 SilkRoad, AI Expert Aug 4 Dinosaurs werenot always the dominant animals on Earth. In fact, they were latecomers compared to othergroups of animals that had been around for much longer. Dinosaursbelonged to a larger group of reptiles called archosaurs, which also includedcrocodiles, pterosaurs and birds. Archosaurs emergedafter the end-Permian extinction about 252 million years ago, which was the worst massextinction in Earth's history and wiped out about 90% of all living species. Archosaurs were not the only survivors of thiscatastrophe. There were alsomammals, turtles, lizards, amphibians and fish. But archosaurs had some advantages thathelped them thrive in the new world. They had an upright posture that allowed them to run faster and moreefficiently than sprawling reptiles. They also had a more advanced respiratory system thatenabled them to breathe better and regulate their body temperature. Some of them evenhad feathers, which may have served as insulation or display. The first dinosaurs appeared in the late Triassic period,about 230 million years ago, in what is now Argentina. They were small and agile creatures that probably ateinsects and plants. They coexisted with other archosaurs, such as rauisuchians(large carnivorous reptiles) and aetosaurs (armored herbivores). But by the end of the Triassic period, about 201million years ago, most of these other archosaurs went extinct due to climatechange and volcanic eruptions. This opened up new ecological niches for thedinosaurs to exploit. The Jurassic period (201 million to 145 million years ago)was the golden age of dinosaurs. They diversified into many different forms and sizes,from tiny feathered theropods to gigantic sauropods. They spread acrossthe globe asPangaea broke apart into separate continents. They also faced new challengesand competitors, such as marine reptiles, flying reptiles and early mammals.But nothing could stop theirdominance. The Cretaceous period (145 million to 66 millionyears ago) was the last chapter of the dinosaur story. They continued to evolveand adapt to changing environments and climates.They developed new featuressuch as horns, crests, spikes and armor. They also gave rise to the firstbirds, which are considered living dinosaurs by many scientists. Aswe all know, their reign came to an abrupt end when a massive asteroid hit theEarth 66 million years ago, causing global devastation and mass extinction. Q2 Doesthe pendulum oscillate at the center of the Earth? A2 SilkRoad,13h No. Now let's dig in. You may have heard of Foucault's pendulum, which is a famous experimentthat shows that the Earthrotates. Foucault hung a long and heavy pendulum from theceiling of a building and let it swing freely. He noticed that the plane of oscillation of the pendulumslowly changed over time, making a full circle in one day. This is because the Earth is spinning under the pendulum,so from our point of view, it looks like the pendulum is changing direction. But from thependulum's point of view, it's just swinging in the same plane, while the Earthmoves below it. This effect is caused by a force called the Coriolis force, which isproportional to the horizontal velocity of the pendulum and the angularvelocity of the Earth. So, whathappens if we move the pendulum to the center of the Earth? Well, first of all, we have to assume that there is ahole in the Earth that goes through its center and that we can somehow ignorethe extreme temperature and pressure there. Then, we have toconsider two things: gravity and rotation. At the center ofthe Earth, gravity is zero, because you are equally pulled by all directions. Thismeans that there is no restoring force to make the pendulum swing back andforth. So, if you give it a push, it will just keep moving in astraight line until it hits something. No oscillation at all.At the center of the Earth,rotation is also zero, because you are not moving relative to the Earth's axis. There is no Coriolis force to make the pendulumchange its plane of oscillation. Even if you somehow manage to make it swing somehow,it will just keep swinging in the same plane forever. No rotation at all. Bottom Line: No, a pendulumcannot oscillate at the center of the Earth. Itcan only oscillate when there is some gravity and some rotation to make itinteresting. Q3 Whatare some useful medical facts? A3 TinyNair, Cardiologist at PRS Hospital, Trivandrum3y WrongConcepts that can affect You. Headache! must be high blood pressure High BP generally don’t cause headache. Unlike popular belief, most headaches arenot because of high BP. Rarely a very severe blood pressure elevationcan cause headache by creating ‘cerebral edema’ or stroke, but uncomplicatedblood pressure generally doesn’t cause headache. Don’t eat sugar. You will get diabetes Eating sugars don’t make you diabetic.Diabetes is caused byeither reduction of insulin secretion or reduction of its effect on the tissues. A diabetic patient can have undue rise of blood sugarif he takes lotof sugar, butsugar intake per-se doesn’t cause diabetes. Eat carefully,avoid junk food. You will not get cholesterol Eating abalanced diet doesn’t ensure normal cholesterol 60 percent ofblood cholesterol is manufactured by endogenous pathway. So stopping / avoiding fatin diet doesn’t ensure that you cholesterol will be normal for sure. Doctor told me totake one tablet, just to be safe, I just take half. Low dose medicines are not necessarily safer. Lower dose of medicine may not have a therapeuticeffect since effect of a drug is linearly related to its dose. In contrast side effects areoften non-linear. A person allergic to penicillin can have reaction at even theminuscule dose of it but such a dose will do him no good. Pricking painat one point in chest is dangerous Not at all. Pricking, localised pain, that increase on deepbreathing is generally not heart related. If you can point your pain toan area less than a square centimeter, the pain is unlikely to be cardiac I have a pain inthe lower jaw especially when I walk; may be a bad tooth. Pain going tothe jaw on exertion is almost always heart pain. Jaw discomfort on walking; don’t fixup an appointment with the dentists. Go to a cardiologist. I am a diabetic;recently I started feeling exhausted. I am anasthmatic; recently my asthma has worsened. Both thesesymptoms may point to a cardiac symptom. Silent attacks are seen in diabetes and chronic asthma, whomay not feel chest pain, but extreme exhaustion or worsening asthma. Take care. Thesefacts may be helpful. Q4 Whatseems hard but is really easy? A4 VijayaLakshmi,Retired Finance manager at Coal India Limited (A Maharatna Company)6y Few years back one of our neighbors, Mr.X, borrowedthe two wheeler from my husband. there was an urgent job and he has no vehicle. It was perfectly OK for us. We have to help others in need. Right? The same person borrowed the two wheeler the next dayalso. He wanted to go to town to purchase some books. It was not so urgent job.He could have taken an auto. But my husband couldn’t say no. He handed over thekeys.This continued forfor two or three months. After every 3–4 days he would borrow thevehicle and not even bothered to fill up the petrol tank. Some times hewould return the vehicle with empty petrol tank. My husband uses this two wheeler very frequently. Wheneverthere is some urgent work, the vehicle would not be available for him. At one point of time the two wheeler became thepublic property of our building. Now it became very difficult for husband to say ‘no’to any one. “Why don’t you stop giving keysto others. You are facing problems when going out” I said. “If I say noto Mr.A he feels bad because I have given it to Mr.B yesterday” “but how longit will continue? It should be stopped at one point of time. You are not being able to use itwhen you need it” It became very difficult for both of us to say ‘no’to some one. Then our daughter took the lead.“If you people arehesitant(మీకు మొహమాటంగా ఉంటే-meekumohamatam ga unte) I will tell” she said. And she did it! Two wheeler storyover. Now starts the four wheeler story. After one year of this incident, one person of ourbuilding wanted our car. We know that it is not any urgent work. “Sorry but thereis some problem with the car. I know one taxi person(there were no OLA or Uberthat time). If you want I will call him. He will come within five minutes”.said my husband. The other person knew that it was an indirect way ofsaying ‘no’So neither henor any person borrowed the car after that. The matter finished very easily. There were no harshfeeling at all. So saying ‘no’ iseasy (if it is told in the beginning) even though it seems hard. In Telugu there is one idiom “అంత్య నిష్టూరం కంటే ఆది నిష్టూరం మేలు-antyanishtooram kante aadi nishtooram melu)” which means becoming bad in thebeginning is better than becoming bad at the end”Helping others is differentfrom saying ‘yes’ for the sake of maintaining one’s image. -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/thatha_patty/1927086511.2977317.1703860926400%40mail.yahoo.com.
