CULTURAL QA 06-2023-15 Q1 How do I pick the right door colourpaint?
Gopala Krishnan, FormerAssistant General Manager 1996-2004 at Department of Telecom (1966–2004)Justnow Painting is donefor protection of the door. Mostly teak wood doors are not painted, butpolished. Depending on theclimate, certain paints are not good. One such is white. Rain affects the doors opening tooutside, moisture and dust can make the door giving a poor appearance. Repeatedmaintenance is necessary in a country like India. For indoors white is OK, if must be well maintained. Generally dark colourslike dark brown are moresuited in such areas. Nowadays absorbinglight is not given much importance. Any colour pleasing to eye and attracting can be used, in my opinion. Q2 Why do airplanes have windows? A2 Vishnu Ravi, Bachelor of Engineeringin Aerospace and Aeronautical Engineering, Indian Institute of Technology,Madras (IITM) (Graduated 2015)Jun 2 Airplanesincorporate windows for a variety of purposes: Managing Air Pressure: The utilization of roundwindows in modern aircraft serves the purpose of effectively managing airpressure differentials both inside and outside the plane. While cruising ataltitudes above 10,000 feet, the aircraft cabins are pressurized toapproximately 11-12 psi, whereas the external air pressure dwindles to merely4-5 psi. This significant contrast in pressure places stresses on the windows,necessitating their robustness throughout flights. Enhancing Comfort: In addition to providing ameans of egress during emergencies, airplane windows contribute to a morecomfortable flying experience, particularly for passengers who experience fearof flying. Gazing outof the window can instil a sense of control and alleviate anxiety amongpassengers. Ensuring Safety: The presence of windows enablespassengers to visually assess potential threats from various sides of theaircraft, such as fires that may occur following a runway excursion. Aerodynamic Considerations: The design ofairplane windows is intricately linked to the aerodynamics of the aircraft.Round windows are better equipped to withstand the pressure differentialsbetween the plane's interior and the external environment, which is why theyare employed instead of square windows. Weight Efficiency: Enlarging the windows wouldaugment the weight of the aircraft, consequently escalating both themaintenance costs and overall weight. As a result, freighter planes forego windows, as thestructural components surrounding them contribute to additional weight. Multiple Protective Layers: Passenger aircraftwindows are typically composed of three layers of acrylic material, providing an additionalsafeguard by effectively managing pressure disparities and ensuring thewell-being of both the aircraft and its occupants. Marketing Advantage: Windows were swiftlyrecognized as a notable selling point in the early stages of passengeraviation. While aircraft without windows would possess enhanced strength and bemore cost-effective and easier to manufacture, the presence of windows ispreferred by passengers. Q3 What will happen if I run an airconditioner in an empty room surrounded by fully closed walls? A3 Ajay Meda, Experienced in theinstallation and repair of AC's Updated 2y There seems to besome confusion among many people on how exactly Air conditioner’s work. So, letme throw on light on the process. An Airconditioner essentially cools the air in a room by transferring it’s heat fromthe inside to the outside. No air is moved in and out of the room . Once the desiredtemperature is reached inside the room, the AC switches off and only getsswitched on when the temperature has increased a little inside the room. **It is dangerousto stay in a room with completely closed windows (with or without the ACrunning) since the percentage of carbon dioxide increases and you will sufferfrom asphyxiation (lack of fresh air to breathe). **The best way touse an AC is to set an optimal temperature and open at leastone window slightly so that there is proper ventilation in the room. My note-** I washighlighting these points in many of my earlier notes also. There were responses with difference- all doors and windows must be closed for better air conditioning.Since one window is slightly opened fresh air also enter inside. There will not be any suffocation,if any problem occurs to the AC system. Q4 Did primates invent bananas? A4 Matt Riggsby, MA ArchaeologicalStudies, Boston University9h Yes. This is a wild banana: Chock full of seeds. It’s also got a tough skin, it’spretty small, and such flesh as it has isn’t very sweet. It’s pretty different from thebananas you get at the grocery store. That kind of banana is theproduct of thousands of years of domestication and selective breeding. Earlyfarmers in Southeast Asia started growing fruit not much unlike these but bredthem for fewer seeds, softer skins, sweeter pulp, and so on. Eventually, this processproduced the substantial, ready-to-peel-and-eat bananas we know today as wellas the tougher, starchier plantain. So, then, bananasare the product of deliberate artifice in breeding, and that breeding was doneby our species, which is a primate. Primates invented bananas. My note- When Istarted gardening, I could get a Banana sapling, intimated by nursery that they have prepared it fromseeds. It grew well, tall, with wider and lengthy leaves and finallyvery attractive and small size banana appeared. Oncecut and after ripening I found the bananas have least pulp and seeds to thesize of a pepper. Eatingit was very difficult, removing seeds. But flesh was very tasty. Having noother way, I cut and removed it from the garden. Q5 What is Hz? How do you measure or checkit? A5 Offerbazar24/7,Btech in Ekashila HighSchool & Rd Junior College, Ekashila High School (Graduated 2021)36m Hz stands for hertz and is the unit of frequency in theInternational System of Units (SI). It represents the number ofcycles or events that occur in one second. In simple terms, it measureshow many times something happens in a given time frame, specifically within onesecond. Hz is commonly usedto measure the frequency of various phenomena, such as electrical signals, sound waves, radio waves, andcomputer processor speeds. Here are a few examples: Electrical signals: In electronics, the frequency ofalternating current (AC) is measured in hertz. For instance, standard householdelectricity in many countries has a frequency of 50 or 60 Hz. My note- Nowadays in Chennai, it is observed the cyclesgetting reduced and for fraction of a second, we could observe lights going OFF as if the supply is going OFF. Sound waves: The frequency of sound is alsomeasured in hertz. It determines the pitch of a sound. For example, a tuning fork vibrating at 440Hz produces the musical note A. Radio waves: The frequencies of radio waves,including those used for communication and broadcasting, are measured in hertz.FM radio stations typically operate in the range of 88 to 108 MHz (megahertz),which is equivalent to 88 million to 108 million hertz. To measure or checkthe frequency in hertz, different methods are used depending on the specificphenomenon: Electrical signals: Oscilloscopes are commonlyused to measure the frequency of electrical signals. These instruments displaythe waveform and provide frequency analysis. Sound waves: In the case of sound, a device calleda frequency counter or a spectrum analyzer can be used to measure the frequencyin hertz. Radio waves: For radio waves, specializedequipment such as spectrum analyzers or radio frequency (RF) meters are used tomeasure the frequency. In many cases,modern devices and applications provide built-in frequency measurementcapabilities. For example, software-basedtools on computers or smartphones may offer frequency analysis for audiosignals or provide information about the clock speed of a processor. All the above QA are from Quora website on 15-06- 2023. Quora answers need not be 100% correct answers . Compiled and posted by R. Gopala krishnan, on 15-06-2023 -- 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]. 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