CULTURAL QA 10 -2021-28 Being compilation there maybe errors
Q1 Where do magnets get their energy torepel other magnets from? Does it last forever? A1 Mark John Fernee 20+ years as aphysicist Updated Oct 18 My note- Lengthy answer. Science nd Maths knowledge isrequired That’s a tricky concept (well actually quite simple ifyou know enough physics) and most likely responsible for a great deal ofmagnet mysticism. It seems that many people think of magnets as somehow magic. This most likely stems from the fact that when you bringmagnets together, you can actually feel a force. Furthermore, this force actsover a distance without any contact. In our everyday experience, this is ratherunusual, and so intuition can lead us to wrong conclusions. So let’s look at howphysics describes this situation. The standard high school textbook definition of work is W=F⃗ ⋅s⃗ . Work, which is energycorresponds to a force acting over a distance. However, the work and the force are very different.In particular, if a force doesn’t act over a distance, there is no energyexpended. This is good, because it means that bridges can remain intact withouta power supply, because they are under constant stress (which is just a form offorce). That stress is ultimately due to gravity, but as long as all the forcesare balanced, a structure can be maintained. Possibly, another cause for confusion is that muscles dorequire energy to remain flexed. That seems to indicate that energy and force are somehowsimilar. However, that’s due to how muscle contraction actuallyworks. Muscles in their contracted form require a supply chemicals to remain inthat state. This state of the human physiology can feed our intuition aboutforces and energy. Therefore, I think the best counter example is to think about bridges. Nothingsupplies them with energy to remain standing. Magnets just happen to demonstrate an important concept inphysics, and that is potential energy, or a potential field. Moreover, a forceis related to the spatial change in potential energy. That means if thepotential changes from point A to point B, there will be a force. Just think of a hill. Thegravitational potential changes as you go up or down the hill.Therefore, there will be a force pointed down the hill. Mathematically, this can be written as, F⃗ =−∇ϕ(x,y,z) . This gradient operatorjust calculates the slope of the scalar potential, which is a vector quantity. This is the physics you need to know to understand magnets. The magnetic field of the magnet is the magnetic potential. For twomagnets, they both have fields, which will combine into a single effectivefield. These fields do not need any batteries to maintain. They arebased on the collective angular momentum of the electrons in the material.Angular momentum is conserved and doesn’t need to be maintained. However, for twomagnets, if they are far apart, their individual fields are effectively zero atthe location of the other magnet. So the other magnet exists in a relatively uniform flatpotential. Therefore, there is no force between them. But we can bring themtogether. When we do that, the potential changes from uniform and flat tosomething that changes in space. This is when we feel a force between themagnets. If we continue bringing them together, the force increases. Notice,what’s happening here. We are bringing them together. We feel the force, butkeep moving the magnets. Therefore, we are providing the energy via our definitionof work. Furthermore, theorientation of the magnets determines whether the force is repulsive orattractive. strong magnets, maintaining a repulsive force becomesdifficult as they are brought closer. Any slight mis-orientation will result in a torque thatwill act to flip the magnets over, which will change the sign of the potentialfrom positive to negative. A negative potential is like falling down a hole, you want tobe at the bottom of it, and it is difficult to climb out. When the magnets aresticking to each other, that’s as deep as you can go down the well. Describing the process of a magnet flipping and joiningtogether is beyond the scope of this answer. In essence all theenergy that you have input into bringing the magnets together is converted tothe violence of the flip and collision of the magnets and is dissipated. Now they are stuckand it will take energy to pull them apart again. In short, it’s the act of moving magnets that takes energy.Maintaining a force need not take any energy, as demonstrated by a bridge.Furthermore, the field of a magnet is a manifestation of the combined angularmomenta of the constituent electrons. As these angular momenta come fromquantum states (usually in their lowest energy configuration), they cannot belost, and so are maintained indefinitely. That’s why you can’t directly extract energy frommagnets. They are not batteries. Magnets are most useful in electric motors because theycan maintain a constant magnetic field, which provides a potential that can be used by the motorto generate work. The electric part of the motor creates electromagnets, whichinteract with the field of the permanent magnets. However, the field of the electromagnets can be controllably flipped, such thatthe orientation of the magnets can be made to continuously flip, which is whatpowers the rotating motion. My note- In the earthwe get iron ore. In iron the ions are arranged in a linear manner creating nature magnetism.Magnets if hanged maintain North South direction. Magnets attract other magnetic material.Hence in the pin box pins are hold due to the magnetism of a small magnetinside. Q2 Do people feel satisfied afterbecoming an IAS officer? A2 Penguin India Publishing yourfavourite books since 19871h Those desirous of joining the service must have dreams ofcreating a better society that is well-governed and where the needs and theexpectations of every ordinary citizen are fulfilled. This should be the lifelongendeavour of an IAS officer. No job in the world can give you the variety thatthe IAS provides. You run districts, head diverse departments like health,agriculture, education, etc. Everywhere, your approach and initiatives set thetone for the department. You are always in a leadership position and can betransformational. It is this variety, diversity and job satisfaction one mustwant if he or she desires to join the IAS. Alok Ranjan, theformer Chief Secretary of the Government of Uttar Pradesh, brings togethersections full ofinformation that every aspiring officer should know. While sharing his ownexperiences, he provides a deep understanding of the IAS as an institution,valuable tips and insight for cracking the daunting UPSC exam, the bestresources to prepare for it, how to ace the interview, and how to build asuccessful career in the services. Consider this book as your first steptowards the power and prestige that comes with serving the nation as an IASofficer. Making a Difference: The IAS as a Career Q3 Why aren’t raisins just called driedgrapes? A3 Lucia Garcia Worked at Hospitals Sun "Raisin" generally refers to grapes in old French,and English borrows the word from French. In many years of international trade, people are used to calling dried grapes"raisins". Raisins are fresh grapes that have been sun-dried andshade-dried, which can be made from a wide variety of grape types. The shelf life ofraisins is very long, about 18 months. Raisins have low water content and are easy to transport andstore. Raisins are a typical high-energy nutrient. Raisins contain veryhigh sugar content. 100 grams of raisins contain about 60 grams of sugar, most of whichare glucose. Glucose is easier toabsorb and use by the body than any sugar, and can directly replenish energyfor the body and quickly relieve fatigue. At the same time, raisins are high-calorie foods, 100 gramsof raisins contain about 340 calories. Although raisins arevery nutritious, eating too many raisins can easily lead to obesity. It is recommended to eat 2 tsp of raisins per day. Q4 Why does Bengaluru look richer thanChennai? A4 Anonymous Oct 21 Because Bangalore has sizeable amount of North Indians andthey are famous in showing off and copying fashion trends faster, Whether money is there or notthey like to show off. That does not mean they are richer. In South you can easily notice a rich person wearing Normalslippers and walks away with simple cloth. Nearby you can also notice a lessrich person walking with Ray Ban glasses which he bought on sale and a girlwalking with mini skirt and a golden handbag. And because of this mix ofpopulation Kannadigas also like to become trendy and have good dressing skills. But Chennai is bitlacking in showing it off and it’s dressing skills. And more over for Chennai’s humidity we can’t wear beautifulpull overs as like in Bangalore. All that glitters are not gold! Q5 My fasting blood sugar is 79 andHBA1C is 6.8. I am 40 yrs of age. My height is 5,11 and weight is 73kg. Lookingat HBA1C, I have already started diet control and regular exercise. Shall Itake diabetic medicine also or this is sufficient? A5 Diabetes ManagementAnswered byVKRaoFri When I was around 55 my fasting sugar was above 120 and myhba1c was above 6.5. from then I started walking and started controlling my diet. Till now (7 years over ) I have nottaken medicines. My fasting sugar ranges between 92 to 120 ( finger prickmethod). In 2019 my hba1c was below 6. My diet modification andwalking helped me so far. My doctor has notsuggested any medicines for sugar. Hence you may talk to you doctor and followhis suggestion without worrying much. But frequent sugar testing will help youa lot in following suitable diet. I am not a doctor and I have given my experienceonly. My note- For few food control can reduce high blood sugar. Iread a lot of item in whatsapp about food control and diabetics. One week back I just started to vegetable less boiled andsalads and fruits. Very little wheatrice or rice. Though taking insulin, I found blood sugar levels have made good reduction. Q5 What happens when you eat an appleevery day for a month? A5 Lucia Garcia Worked at HospitalsOct22 Apple is a popular fruit with extremely rich nutritionalvalue and is known as the "King of Fruits". Apple's nutrition is comprehensive and balanced, and eatingapples can supplement most of the nutrients the body needs. Apple contains a biologically active substance: applepolyphenols. Apple polyphenols are a natural antioxidant that can effectivelyremove harmful free radicals, protect cells, and delay the aging process ofcells. Regular consumption ofapples is very beneficial to the health of cells. With healthy cells, musclesand skin will becomemore elastic and resilient, wrinkles will be reduced, and you will lookyounger. It is worth mentioningthat rinse the apple with water and eat apple with the skin. Apple skin contains ursolic acid. Ursolic acid is a kind oftriterpene compound, which has obvious antioxidant function, and has goodanti-aging and anti-oxidant effects on the skin. As the saying goes, eating an apple a day can make you lookten years younger Q6 What happened to the vanaras postRamayana? A6 Bhanu Kiran Admires the stories ofRamayana Sun According to Uttara kanda of Ramayan, Ramaordered Hanuman to stay on earth as long as people take the name of Rama. After this, Kakutstha spoke to Hanumat. ‘You have alreadymade up your mind to remain alive. Do not make that pledge of yours come false.O lord of the apes! As long as my account is spoken about in the world, tillthen, remain alive and follow your pledge.’ Kakutstha Raghava then told all theapes and bears, ‘Come with me.’ Source: Valmiki Ramayan CE Chapter7(98) 2. Sugreeva put Angada in-charge of Kishkinda and went toAyodhya along with few other Vanaras to join Rama who was departing the Earth. 3. Angada, Nal and Nil stayed back at Kishkinda and must haveruled the kingdom for some period. 4. Jamabavan got settled in a cave and met Krishna inDwaparayuga and gave his daughter Jambavati and Syamantaka Jewel to Krishna.This story is described in Srimad Bhagavatam. Thus addressed, Jāmbavān happily honored Lord Kṛṣṇa by offering Him his maidendaughter, Jāmbavatī, together with the jewel. Source: Srimad Bhagavata Canto 10 Chapter 56 5. Hanuman has a cameo appearance in Mahabharat. Heblocked the path of Bhima when Bhima went to fetch flowers from Gandhamadana mountains. Before leaving,Hanuman blessed Pandavas for victory in the war. And thinking that he (Bhima) should not pass thatway,(Hanuman) lay across the narrow path, beautified by plantain trees,obstructing it for the sake of the safety of Bhima. With the object that Bhimamight not come by curse or defeat, by entering into the plantain wood, the apeHanuman of huge body lay down amidst the plantain trees, being overcome withdrowsiness. Source: Mahabharat Vana Parva: Tirtha-yatra Parva: SectionCXLV 6. During Yudhisthira’s Rajasuya sacrifice, Sahadeva wentin southern direction and fought with the Vanaras settled in Kishindha kingdomfor seven days. TheVanaras were gratified with Sahadeva and gave tributes. The long-armed hero having vanquished that monarch marchedfurther to the south. And then he beheld the celebrated caves of Kishkindhyaand in that region fought for seven days with the monkey-kings Mainda andDwivida. Those illustrious kings however, without being tired an the encounter,were gratified with Sahadeva. And joyfully addressing the Kuru prince, theysaid,--'O tiger among the sons of Pandu, go hence, taking with the tribute fromus all. Let the mission of the king Yudhishthira the just possessed of greatintelligence, be accomplished without hindrance. Source: Mahabharat Sabha Parva: Jarasandhta-badha Parva:Section XXX 7. A Vanara by the name of Dvivida was killed by Balarama inDwaparayuga. The valiant one was Mainda’s brother and was Sugriva’sadviser. As an act of vengeance for his friend, the ape created havoc in thekingdom. He set cities, villages, mines and cowherd settlements on fire byigniting flames. On one occasion, he uprooted a mountain and pulverized all theregions, especially of Anarta. That is where Hari, his friend’s killer, dwelt. The lord of the apes now clenched his arms, which were likepalm trees, into fists. He approached Rohini’s son and struck him on the chestwith these. The Indra among the Yadavas flung aside his club and his plough. Heangrily struck him on the collarbone with his two hands. He started to vomitblood and fell down. Source: Bhagavata Purana Chapter 10(67) 8. Temple of Hathor at Dendera, built around 2250 BC hascarvings of Vanaras. In Kishkinda Parva of Ramayan, Sugreeva ordered allsubraces of Vanaras fromall over the world to assemble in his capital. Few of the Vanaras must havearrived from modern day Egypt too. They might have settled there after the warand continued their race. Q7 Is it safe to place stainless steelcontainers in a refrigerator? A7 2 Answers N.Sunil Kumar , AssociateProfessor, Humanities & Sciences (Biol) at Methodist College of Engineering and Technology(2019-pr…Answered Apr 3, 2019 Stainless steel as storage container in refrigerator willnot be a problem as long as the material is thin and light to play the role ofstorage container. Beinga metal it is a good conductor of heat and keeping thickness thin increasesefficiency of heat loss from the food to container to surrounding air. Thick steel will take time to cool then create a gradientwith food hence takes longer to chill. The fact to bear in mind is, more the thickness of foodmaterial the poorer the cooling of core (which is where the bugs thrive) henceliquid or large vessels are not recommended, unless you mix content after 6hours for uniform cooling. Acidic foods are to avoided if storing for long period as steel hasmore Chromium than normal for that sparkling sheen, it dulls . 2ND ANSWER-Annamalai Ram, former Chief Mechanical Engineer , Engg ConsultantAnswered Apr 2, 2019 Stainless steel metalsare most favoured by food and beverage industries. It does not stain, while inside or outside the refrigerator.Stainless steel is the metal used for most of the surgical instruments andduplicated bodies embedded inside the human body . I think, stainlesssteel is biologically, safe and no problem in using inside refrigerator. Stainless steels are the only metal, used in inductionheaters and electrical resistance heaters/ovens. Please do not use Stainless steel or any metal inside themicro-oven cooking purpose, as electrical arcing is to appear between the vessel and the oven walls. Allthe above QA are based on Quora digest to me on 27-10-2021. Quora answers neednot be 100% correct answers Compiler-R. Gopala Krishnan, 78 dated 28 -10-2021 -- 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/1270854716.1482899.1635377822894%40mail.yahoo.com.
