CULTURALQA 11-2023-15A All the BELOW QA are from Quora DIGEST to me on 15-11-2023.
QUORA ANSWERS NEEDNOT BE 100% CORRECT ANSWERS. Compiled and posted by R.Gopala Krishnan, 80, on 15-11-2023. Q1 Whydo planes stop before takeoff? A1 VishnuRavi, Aerospace Engineer | Aviation Enthusiast & Content Creator Aug 1 Whenit comes to ensuring a safe and smooth flight, stopping before take-off iscrucial for several compelling reasons: Configuration: Before embarking on their journey, planes make a momentary stop to configure flaps. These movable wing surfacesplay a vital role in generating the lift needed during take-off, ensuring aseamless departure. Clearance and Communication: The expertise of a skilled pilot extends beyond just maneuvering theaircraft. They need toobtain clearance from air traffic controllers and engage in essential radiocommunications with the destination. This meticulous process guaranteesthat all flight paths are secure and coordinated. Safety Checks: Your safety is our priority, which is why weconduct rigorous safety checks before take-off. Particularly for pistonengines, we run them at high power to detect any potential issues that mighthinder a safe journey. Emergency Preparedness: In any unforeseenemergency, your experienced pilot remains vigilant and prepared. Whether it'sengine failure, adverse weather conditions, loss of control, or technicalmalfunctions, they can promptly abort take-off and apply the brakes to ensureyour safety. V1Speed: The decision to proceed with take-off or abort is influenced by the V1speed, the maximum speed at which take-off can still be safely aborted. Before reaching this critical point, the pilot has fullcontrol to make the right call. NotEvery Plane Stops: I acknowledge that not all planesrequire a complete stop before take-off. Rolling take-offs are common, where clearance is obtainedwhile the plane is already aligned with the runway, allowing for asmooth and continuous departure. The Runway's Role: The length of the runway is a pivotal factor for mostplanes to gain sufficient speed for lift to overpower theforce of weight, allowing for a successful take-off. In conclusion, the brief pause before take-off allows pilots to configureflaps, communicate effectively, ensure safety, and beprepared for emergencies. Trust in our experienced pilots, as they makewell-informed decisions based on V1 speed and potential issues to prioritizeyour safety and deliver an unparalleled flight experience. Q2 Whatmakes Indian moms happy? A2 SalilChoudhary, Stock market trader & Content creator@ Financeler9h A government job Marriage before30 Buying gold whenever you save adecent amount of money Wet towels hanging on the balcony, not on the bed A cup of tea after a hectic day Free dhaniya and mirchi withvegetables Bargaining with vendors andshopkeepers Neatand clean kitchen after cooking a special out-of-the-box dish. Eat lauki, Tinde, and karela ki sabji Smilingfaces of family members Q3 Whatwould happen if the Earth abruptly stopped spinning for 42 seconds? A3 AamirCheema, Faculty member at Monash university Australia, research interests incomputer science Updated 7y For a start, earth is not spinning.If it is everything including water will be thrown off. This answer assumes that the earthstops suddenly for 42 seconds and then starts spinning at its normal speed. 1.If the earth stops spinning suddenly, the atmosphere will continue to spin. This means very high speed winds, i.e.,approximately 1670 Km/hr which is earth's rotational velocity. The winds willalso cause erosion to the earth's crust. 2.A sudden stop of the spin will have a similar effect to when you press brakeson a moving car. You guessed it right, you (and every other object on this earth) will fly with a speed ofearth's rotational velocity, around 1670 km/hr. This is a very high speed but not enough tolaunch the objects in space, so no space trip for any of us. 3. The earth will become a perfectsphere because the bulge in the earth is due to its rotation. This bulge is along the equator and the oceans as theyare now are due to this bulge. If there is no bulge and the earth is a perfect sphere, the oceans willredistribute resulting in one massive supercontinent that circles the equatorand the north and south poles will become oceans. See the image below: Butsince the earth will stop spinning only for 42 seconds the bulge will notcompletely disappear before the earth starts spinning again. However, the effect will be enough to cause flooding (infact, gigantic tsunami) but only for 42 seconds after which the bulge willreappear and the flooding will retreat (causing more havoc). 4. You will have a day 42 secondslonger. Edit: Thanks Pieter-Paul Kramer andMalakai Lasol Morgan for the comments that helped to improve the answer. Q4 Whyare petrol tankers elliptical in shape? A4 RebeccaWilliams, Car Lover Nov 9 Petrol tankers are elliptical in shape because of several reasons relatedto stability, safety, and efficiency. Petrol tankers are vehicles thattransport liquid fuel from one place to another. They have to deal with variouschallenges such as road conditions, traffic, weather, and regulations. The shape of the tankers is veryimportant to ensure a smooth and successful operation. One of the main reasons why petroltankers are elliptical in shape is to lower the center of gravity of thevehicle. The center of gravity is the pointwhere the weight of the vehicle is balanced. The lower the center of gravity, the more stable thevehicle is. This is especially important for petrol tankers because theycarry a large amount of liquid that can shift and slosh inside the tank,creating a lateral force that can cause the vehicle to tip over or losecontrol. An elliptical shape reduces the height of the tank, whichin turn lowers the center of gravity and increases the stability of thevehicle. To maximize the volume of the tankwhile keeping the height under a certain limit. Petrol tankers have to complywith the regulations and standards of the road authorities, which specify themaximum dimensions and weight of the vehicles. The height of the vehicle is one of the criticalfactors because it affects the clearance under bridges, tunnels, and overheadwires. An elliptical shape allows the tank to have a larger volume thana circular or rectangular shape while keeping the height within the permissiblerange. This means that the petrol tanker can carry more fuel with less trips,saving time and money. Toimprove the aerodynamics and fuel efficiency of the vehicle. Aerodynamics is the study of how air flows aroundobjects and affects their motion. Fuel efficiency is the measure of how muchfuel is consumed by the vehicle per unit of distance. Both of these factors areinfluenced by the shape of the vehicle, which determines the amount of drag orresistance that the air exerts on the vehicle. Drag reduces the speed andincreases the fuel consumption of the vehicle. An elliptical shape reduces the drag by having a smooth and streamlinedsurface that minimizes the turbulence and pressure difference caused by theairflow. This means that the petrol tankercan travel faster and use less fuel, reducing the environmental impact andoperational cost. My note- Further to reduce centre ofgravity and more control, the elliptical tank is divided in to three in mostoil tankers. Q5 Whatare some unwritten social rules everyone should know? A5 JaiNarayan, Mar 10 1. 1+1 = 3 if you don’t use thecondom. 2. Alcohol increase size of the“SEND” button by 89%. 3. Never underestimate the power of stupid people in large groups. 4. Sometimes we create our ownheartbreaks through expectations. 5. Life is too short to be with thewrong person. 6. Just because you love them, itdoesn’t mean they’re right for you. 7. Feelings that come back arefeelings that never left. 8. Everything’s not as easy asgetting fat. 9. Even a bad day is just 24 hours. 10.It’s not your job to fix people. -- 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/1210532360.2248303.1700056537549%40mail.yahoo.com.
