CULTURAL QA 05-2023-26

Q1         Whydo dogs bark and wolves don't?

A1          Animal Lover | Dog Lover | Cat Lover |Loving Husband May 18

Dogs and wolves are both members of the Canidae family,which also includes 
foxes, coyotes, and jackals.However, there are some differences in their 
behaviour, including the way theycommunicate. Dogs bark as away to communicate 
with humans and other dogs, but wolves do not bark in thesame way. In this 
essay, we will explore the reasons behind thisdifference and the different ways 
that dogs and wolves communicate.

First, it isimportant to understand that dogs and wolves have different 
lifestyles. Dogs have been domesticated forthousands of years and have been 
bred for specific purposes, such as hunting,herding, and protection. As a 
result, they have developed a closerrelationship with humans and are more 
social animals. Wolves, on the other hand, arewild animals that live in packs 
and hunt for food.

One theory for whydogs bark and wolves do not is that domestication has changed 
the way dogs communicate. When humansfirst began domesticating dogs, they 
selected for traits that were useful tothem, such as loyalty, obedience, and 
the ability to communicate with humans. Over time, dogs evolved to be 
moreattuned to human communication and to use vocalizations, such as barks, 
tosignal to their owners.

Another theory is that barking is a form of socialcommunication that has 
evolved specifically in dogs.

In the wild, wolves communicate with each other through avariety of 
vocalizations, including howls, growls, and barks.However, wolves donot bark in 
the same way that dogs do, and it is possible that barking is aunique 
adaptation that has evolved in dogs as a result of their closerelationship with 
humans.

There are also somephysiological differences between dogs and wolves that may 
contribute to theirdifferent forms of communication. Dogs have shorter snouts 
and smaller teeth than wolves, which may make iteasier for them to produce 
high-pitched sounds like barks. Wolves,on the other hand, have longer snouts 
and larger teeth, which may make it moredifficult for them to produce these 
sounds.

While wolves do notbark in the same way that dogs do, they do have a variety of 
vocalizations thatthey use to communicate with each other. For example, they 
howl to communicate with othermembers of their pack over long distances. 
Howling is a way for wolvesto maintain social bonds and to coordinate their 
hunting efforts. They also usegrowls, snarls, and other vocalizations to 
communicate with each other duringsocial interactions.

Inconclusion, the reasons why dogs bark and wolves do not are complex 
andmultifaceted. Domestication,social communication, and physiological 
differences may all play a role in thisphenomenon. While dogs have evolved to 
communicate with humans through barking,wolves have developed a range of 
vocalizations that they use to communicatewith each other. Understanding these 
differences can help us better understandthe behaviour of these fascinating 
animals.

Q2         Whocreated the first computer virus?

A2          Mcleodproducts, Business Consultant |Digital Marketing Services | 
IT Guru9h

The first computer virus is widely considered to be the"Creeper" virus, which 
was created in the early 1970s by a programmernamed Bob Thomas. This virus 
wascreated as an experiment to test the capabilities of the ARPANET 
(AdvancedResearch Projects Agency Network), which was a precursor to the 
moderninternet.

The Creeper virus was designed to infect DEC PDP-10mainframe computers that 
were connected to the ARPANET. Once the virus infecteda computer, it would 
display the message "I'm the creeper, catch me if youcan!" on the computer 
screen and then move on to infect other computers onthe network.

To combat theCreeper virus, a programmer named Ray Tomlinson created the first 
antivirusprogram called "Reaper". Reaper was designed to detect and remove 
theCreeper virus from infected computers.

The Creepervirus and Reaper program were both early examples of the on going 
battlebetween hackers and security experts. As technologyadvanced, viruses 
became more sophisticated and the methods used to protect againstthem became 
more complex.

Throughout the1980s and 1990s, a number of new viruses emerged, including the 
"Brain" virus, whichwas created in 1986 by two Pakistani brothers named Basit 
and Amjad FarooqAlvi. The Brain virus was spread through infected floppy disks 
and would display a messageasking users to contact the brothers to remove the 
virus.

In 1987, the "Stoned" virus emerged,which was named after a message that would 
appear on infected computers saying"Your computer is now stoned". The Stoned 
virus was spread throughinfected floppy disks and could cause damage to the 
computer's hard drive.

In the early1990s, a programmer named John McAfee created the first commercial 
antivirussoftware called VirusScan. This software was designed todetect and 
remove viruses from infected computers.

Since then, viruseshave continued to evolve and become more sophisticated. 
Today,viruses are created by criminal organizations and hackers to steal 
personalinformation, commit fraud, and launch cyber attacks.

In conclusion, thefirst computer virus was the Creeper virus, which was created 
in the early1970s by Bob Thomas. The Creeper virus was an early example of the 
ongoingbattle between hackers and security experts. Since then, viruses have 
continuedto evolve and become more sophisticated, posing a constant threat to 
computersystems and personal information.

Q3         Areall airplane engine's fan blades made out of titanium?

A3          Erika Fernandez, Experience inAviation Field Wed

No, not all airplane engine’s fan blades are made out oftitanium. However, 
titanium is still a very commonand popular material for fan blades, especially 
for large engines.

The fan blades arethe first component of a jet engine that en-counter the 
incoming air. They areusually considered to be part of the compressor section, 
or “cold section”, ofthe engine. Fan blades are mostly made of titanium and 
consist of a blade body,a rounded leading edge (LE) a sharp trailing edge (TE), 
an integral platformand a dovetail or single tooth.

Titanium is a preferred material for fan blades becauseit has several 
advantages over other metals, such as:

High strength-to-weight ratio: Titanium is strong andlight, which means it can 
withstand high stresses and reduce the overall weightof the engine.

High corrosion resistance: Titanium is resistant tooxidation and erosion by 
air, water, salt, and chemicals, which means it canlast longer and require less 
maintenance.

Low thermal expansion: Titanium has a lowcoefficient of thermal expansion, 
which means it does not deform or crackeasily due to changes in temperature.

High fatigue resistance: Titanium can endurerepeated cycles of loading and 
unloading without losing its strength or shape,which means it can cope with the 
vibrations and shocks of the engine operation.

However, titanium also has some drawbacks, such as:

High cost: Titanium is expensive to produce andprocess, which means it 
increases the initial investment and operating costs ofthe engine.

Low stiffness: Titanium is relatively flexiblecompared to other metals, which 
means it can bend or twist under high loads orspeeds.

High sensitivity to foreign object damage (FOD):Titanium can be damaged by 
impact with debris or birds, which can cause cracksor holes in the blade 
surface.

Therefore, some airplane engines use alternative materialsfor fan blades, such 
as:

Composites: Composites are materials thatcombine two or more different 
substances to create a new material with improvedproperties. For example, 
carbon fiber reinforced plastic (CFRP) is a compositethat consists of carbon 
fibers embedded in a plastic matrix. Composites fanblades can achieve overall 
engine weight savings of up to 1000 lbs. When combinedwith a composite 
containment system, the weight savings become very significanton an aircraft. 
The GE—GEnx engine is a prime example of the use of compositematerials for fan 
blades.

Nickel-based superalloys: Nickel-basedsuperalloys are alloys that contain 
nickel as the main element and otherelements such as chromium, cobalt, 
molybdenum, tungsten, titanium, aluminum,etc. Nickel-based superalloys are used 
for turbine blades in the hot section ofthe engine, but they can also be used 
for fan blades in some cases.Nickel-based superalloys have high strength, high 
temperature resistance, highcorrosion resistance, and high fatigue resistance. 
However, they also have highdensity, high cost, and low stiffness compared to 
titanium.

I hope this answerhelps you understand why not all airplane engine’s fan blades 
are made out oftitanium and what are some other materials that are used instead.

Q4         Whatare the consequences of being too clean when it comes to 
hygiene? What shouldwe look out for as signs that we might be overdoing our 
personal hygieneroutines?

A4          Gopala Krishnan, Former AssistantGeneral Manager 1996-2004 at 
Department of Telecom (1966–2004)Just now

First of all it is not possible to be too clean.There is a Malayalam saying” 
Viddhe nampoothiri Viddehe chati” meaning a persontoo much hygiene on the 
walking path finally kept his bare foot on slippery cowdung and fell on the 
road “ not very hygienic.

A person cannot keep his body 100% clean since it is notpossible.

There are nineholes in the human body, one cannot keep them 100 % clean by any 
method.

Q5         Whatis the fruit that Eve ate?

A5          Weights Loss Diet, Health Director |Loving Father | Business 
Director May 13

The fruit that Eve ate is a well-known story from theBible, recounted in the 
book of Genesis. According to thestory, God created Adam and Eve in the Garden 
of Eden, a paradise where theycould live in peace and harmony. God gave them 
one rule: they could eat from any tree in the gardenexcept for the tree of 
knowledge of good and evil. 

If they ate from that tree, God warned, they wouldsurely die.

The story goes onto tell how the serpent, acunning creature, tempted Eve to eat 
from the forbidden tree. The serpent convinced Eve that Godwas lying to her, 
and that if she ate from the tree, she would become like God,knowing good from 
evil. 

Eve was temptedby the idea of gaining knowledge and power, and she took a bite 
of the fruitand shared it with Adam.

Despite the factthat the story of Adam and Eve is well-known, the Bible does 
not actually specify what kind offruit they ate. The Bible simply says that it 
was the fruit of thetree of knowledge of good and evil. Over the centuries, 
scholars and theologians have speculated about whatkind of fruit this might 
have been.

One of the most common theories is that the fruit was anapple.This idea may 
have been popularized by the fact that the Latin word for apple,"malum," is 
similar to the Latin word for evil, "malus."Additionally, the apple has long 
been associated with temptation and sin inWestern culture, thanks in part to 
the story of Adam and Eve.

However, there is no evidence to suggest that the fruitin question was actually 
an apple. The Bible doesnot provide any clues about the fruit's appearance, and 
apples are not nativeto the Middle East, where the story takes place. 

Some scholars have suggested that the fruit might have beena fig, a 
pomegranate, or a grape, all of which are native to the region andhave symbolic 
significance in the Bible.

Anotherinterpretation of the story suggests that the fruit was not a literal 
fruit atall, but rather a metaphorical representation of knowledge.In this 
interpretation, the story of Adam and Eve is a cautionary tale aboutthe dangers 
of seeking knowledge and power at the expense of obedience to God.By eating 
from the tree of knowledge of good and evil, Adam and Eve wereattempting to 
become like God, but in doing so, they lost their innocence andbrought sin and 
suffering into the world.

Ultimately, thequestion of what fruit Eve ate is one that may never be 
definitively answered.The story of Adam and Eve is a powerful and enduring myth 
that has beeninterpreted in countless ways over the centuries. Whether the 
fruit in questionwas an apple, a fig, or something else entirely, the lessons 
that can be drawnfrom the story are timeless and universal: the importance of 
obedience toauthority, the dangers of temptation and desire, and the 
consequences ofseeking knowledge without wisdom.

Q5         Dodogs dislike their cages?

A5          Animal Lover | Dog Lover | Cat Lover |Loving Husband10h

Cages, also known as crates, are a common tool used by dogowners for a variety 
of reasons, such as potty training, travel, and safety.However, some people 
wonder if dogs dislike their cages and if it is cruel tokeep them in one. In 
this article, we will explore whether or not dogs disliketheir cages.

Firstly, it is important to note that not all dogsdislike their cages. In fact, 
many dogs enjoy havingtheir own personal space where they can retreat to for 
comfort and security. Cages can provide a sense of safety and security for 
dogs, especiallywhen they are feeling anxious or overwhelmed.

However, some dogsmay have negative associations with their cages. This can 
happen if the cage isused as a punishment or if the dog has had a traumatic 
experience in a cage,such as being left alone for extended periods of time or 
being forced into acage against their will.

It is also important to note that the size and type of cagecan affect a dog's 
perception of it. Cages that aretoo small or uncomfortable can cause discomfort 
and stress for dogs, while spacious and comfortable cages canprovide a positive 
and relaxing environment.

When usedproperly, cages can be a valuable tool for dog owners. Cages can help 
withpotty training, prevent destructive behaviour, and keep dogs safe during 
travelor when left alone. 

However,it is important to ensure that the cage is the appropriate size for 
your dog,that your dog has access to food, water, and toys while in the cage, 
and thatyour dog is not left in the cage for extended periods of time.

It is alsoimportant to properly introduce your dog to their cage in a positive 
way. Thiscan be done by gradually introducing your dog to the cage and 
providing treatsand rewards for positive behaviour. You can also make the cage 
a comfortableand inviting space for your dog by adding soft bedding, toys, and 
treats.

In conclusion,whether or not dogs dislike their cages depends on their 
individual experiencesand perceptions of the cage. Some dogs may enjoy having 
their own personalspace, while others may have negative associations with 
cages. When usedproperly, cages can be a valuable tool for dog owners. However, 
it is importantto ensure that the cage is the appropriate size and type for 
your dog, and thatyour dog is not left in the cage for extended periods of 
time. Additionally, itis important to properly introduce your dog to their cage 
in a positive way andto make the cage a comfortable and inviting space for your 
dog.

Q6         ArePower banks allowed on planes?

A6          Mayfair Jets, Aviation Enthusiast5h

Hey there! Thisone’s for frequent flyers and gadget lovers alike.

Powerbanks are allowed on planes but, with some conditions.

The key factor is the power bank's capacity which ismeasured in milliamp hours 
(mAh) or watt-hours (Wh).

Airlinesgenerally allow power banks up to a capacity of 100 Wh in carry-on 
luggage orchecked bags.

Power banksbetween 100 Wh and 160 Wh, are allowed as well, but in the carry-on 
luggage.

Anything above 160Wh is typically a no-go for safety reasons.

Why these rules,you ask?

Well, power bankscontain lithium batteries, which, although usually safe, can 
potentially pose afire risk if damaged or defective.

These rules are inplace to minimize the risk in the unlikely event of a battery 
incident.

Q7         Whatare some interesting facts which are not commonly known?

A7          Alex Ferman, Passionate Writer, CA(2013 - present) May 17

1. There’s a company that turns dead bodies into an oceanreef.

My note- authority not checked

2. Calorie chartsdisplayed in fast food restaurants tend to result in people 
making less healthyfood choices.

3. You’re morelikely to get a computer virus from visiting religious sites than 
porn sites.

4. It’s easier toremember things with your eyes closed.

5. When it comes to luxury brands, the ruder the salesstaff, the better the 
sales.

6. Millionaires andcelebrities also use dating apps, but they often opt for 
exclusive dating apps overregular ones.

7. Roller coasters were invented to distract Americans fromsin.

In the 1880s,hosiery businessman LaMarcus Thompson hated that Americans were 
tempted by hedonistic places likesaloons and brothels. Thus, he built America’s 
first roller coaster to give NewYorkers some good, clean fun—away from seedier 
pastimes.

8. Supermarket apples can be up to a year old,having been picked, waxed, 
hot-air dried, and stored in cold storage for six totwelve months before 
reaching grocery store shelves.

9. Dunce caps usedto be signs of intelligence.

10. NASA uses countdowns because of a sci-fi film - a 1929silent film Frau im 
Mond.

11. Theworld's largest waterfall is under the ocean at the Denmark Strait, 
cause bythe density difference between Nordic Sea's cold water and Irminger 
Sea's warmwater.

12. The averageyawn lasts six seconds.

Q8         Islanding distance shorter than takeoff distance?

A8          Erika Fernandez, Experience inAviation Field Mon

It’s a common oneamong aviation enthusiasts and aspiring pilots. The answer is 
notstraightforward because it depends on many factors, such as the type 
ofaircraft, the weight of the aircraft, the atmospheric conditions, the 
runwaylength and slope, the wind direction and speed, and the pilot’s 
technique. 

However, ingeneral, landing distance is usually shorter than take-off distance 
for mostaircraft.

Landing distance isthe horizontal distance that an aircraft travels from a 
point on the approachpath at a selected height above the landing surface to the 
point on the landingsurface where it comes to a complete stop

1. Landing distance consists of two parts: the airdistance and the ground 
distance. The air distanceis the distance that the aircraft travels from the 
selected height to the pointwhere it touches down on the runway. The ground 
distance is the distance thatthe aircraft travels from the point of touchdown 
to the point of stop.

Take-off distance is the horizontal distance that anaircraft travels from a 
point on the runway where it starts its takeoff roll toa point where it reaches 
a specified height above the ground

2. Take off distance also consists of two parts: the groundrun and the climb 
distance. The ground run is thedistance that the aircraft travels along the 
runway until it lifts off. Theclimb distance is the distance that the aircraft 
travels from the point oflift-off to the point where it reaches the specified 
height.

The specified height for landing distance is usually 50 ft(15 m) above the 
ground, while for take off distance it can vary depending onwhether there are 
obstacles in the flight path or not. If there are noobstacles, then a screen 
height of 35 ft (10.7 m) is used for take-off distance.

If there areobstacles, then a screen height of 50 ft (15 m) plus an additional 
margin of15% of climb distance is used for take-off distance2.

The mainreason why landing distance is usually shorter than take-off distance 
isbecause landing involves deceleration while takeoff involves acceleration.

During landing, anaircraft uses various methods to reduce its speed and kinetic 
energy, such asflaps, spoilers, thrust reversers, brakes, and aerodynamic drag. 
These methodsincrease the lift-to-drag ratio and increase the deceleration rate 
of theaircraft. During takeoff, an aircraft uses thrust to overcome drag and 
increaseits speed and kinetic energy. The thrust must exceed drag for 
acceleration totake place and lift must equal weight for lift-off to occur.

Another reason whylanding distance is usually shorter than take off distance is 
because landinginvolves a lower approach speedthantake off involves a rotation 
speed. Approach speed is the speed at which anaircraft flies during its final 
approach to landing. Rotation speed is thespeed at which an aircraft rotates 
its nose up to initiate lift-off during takeoff. Approach speed is typically 
1.3 times the stall speed of an aircraft inlanding configuration, while 
rotation speed is typically 1.1 times the stallspeed of an aircraft in take off 
configuration

3. Stall speed is the minimum speed at which an aircraftcan maintain level 
flight without losing lift.Since stall speed depends on factors such as weight, 
altitude, temperature, andwing configuration, approach speed and rotation speed 
also depend on thesefactors. However, in general, approach speed is lower than 
rotation speedbecause landing configuration involves more flaps and more drag 
than takeoffconfiguration.

Of course, thereare exceptions and variations to these general trends. Some 
aircraft may have longerlanding distances than takeoff distances under certain 
conditions or scenarios.For example, if an aircraft has a high landing weight 
or a high densityaltitude (low air pressure and high temperature), its landing 
distance willincrease because it will have a higher stall speed and a lower 
decelerationrate. Similarly, if an aircraft has a low take-off weight or a low 
density altitude(high air pressure and low temperature), its take-off distance 
will decreasebecause it will have a lower stall speed and a higher acceleration 
rate.

I hope this answerhelps you understand why landing distance is usually shorter 
than take offdistance for most aircraft. If you have any further questions or 
comments,please feel free to reply to this answer. I would love to hear from 
you.

My note- Onaccount of this taller buildings are not permitted near airport   
orplane training centre. In my residence area there is air force training 
centreof Chennai, taller buildings are not permitted.

Q9         Isit bad to eat too many strawberries?

A9          Farhad Rajshahi, Health Consultant23h

Eatingstrawberries in moderation as part of a balanced diet is generally 
consideredhealthy and beneficial. Strawberries are a good source ofvitamins, 
minerals, and antioxidants. They are low in calories and high infiber, which 
can aid in digestion and promote a feeling of fullness.

However,consuming excessive amounts of strawberries, like any food, can have 
somepotential downsides. Here are a few things to consider:

1. Allergies: Some individuals may be allergic tostrawberries, experiencing 
symptoms such as itching, hives, or swelling. If youhave a known allergy to 
strawberries or any other fruit, it's important toavoid them.

2. Pesticide residue: Conventionally grownstrawberries are known to have higher 
pesticide residues compared to some otherfruits. If possible, choose organic 
strawberries or wash them thoroughly toreduce pesticide exposure.

3. Oxalate content: Strawberries contain oxalates,which can contribute to the 
formation of kidney stones in susceptibleindividuals. If you have a history of 
kidney stones or are at risk, it'sadvisable to moderate your strawberry 
consumption.

4. Blood sugar impact: While strawberries have arelatively low glycemic index, 
meaning they have a minimal impact on bloodsugar levels, eating an excessive 
amount can still cause a spike in bloodsugar. This may be a concern for 
individuals with diabetes or those closelymonitoring their blood sugar levels.

5. Dietary imbalance: Consuming excessiveamounts of strawberries might lead to 
an imbalanced diet if other essentialfood groups are neglected. It's important 
to have a diverse range of fruits,vegetables, proteins, grains, and healthy 
fats to meet your nutritional needs.

Overall,strawberries can be enjoyed as part of a healthy diet. However, like 
any food,moderation is key. If you have specific dietaryconcerns or health 
conditions, it's always a good idea to consult with ahealthcare professional or 
a registered dietitian for personalized advice.

My job is to giveyou good advice, but you must consult a doctor before taking 
my advice.

Q10               Isit necessary to use a stand for a refrigerator?

A10        Niraj Raja, Trader & Academician3y

It's not necessarybut if we think about technical aspects then the gap between 
bottom ofrefrigerator & floor is useful for proper air circulation. This air 
flow is important forcondensation process (black tube present on backside of 
refrigerator).Now a days many manufacturers are providing inbuilt standin 
refrigerator unit. Also make sure ur refrigerator is at least 1feetaway from 
wall.

All the above QA are from Quora  website  on   25--05- 2023. 

Quora answers need not be 100% correct answers .

Compiled andposted by R. Gopala krishnan, former ITS, on 26-05-2023

 

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