Sir,Thank you for the correction reg Q3 about Humming birds and details about
human populationin the QA posted.Gopalakrishnan
On Saturday, 17 June, 2023 at 09:20:10 am IST, Rajaram Krishnamurthy
<[email protected]> wrote:
Q3 200000 per day population is net of death. And few facts:
How many people can Earth actually support?
It's no surprise that as the world population continues to grow, the limits of
essential global resources such as potable water, fertile land, forests and
fisheries are becoming more obvious. You don’t have to be a maths whizz to work
out that, on the whole, more people use more resources and create more waste.
But how many people is too many? How many of us can Earth realistically support?
Influenced by the work of Thomas Malthus, 'carrying capacity' can be defined as
the maximum population size an environment can sustain indefinitely.
Debate about the actual human carrying capacity of Earth dates back hundreds of
years. The range of estimates is enormous, fluctuating from 500 million people
to more than one trillion. Scientists disagree not only on the final number,
but more importantly about the best and most accurate way of determining that
number—hence the huge variability.
The majority of studies estimate that the Earth's capacity is at or beneath 8
billion people. Data source: UNEP Global Environmental Alert Service / One
Planet, How Many People? (PDF)
This is a little unsettling considering that as of September 2017, the global
population sits at 7.5 billion, and is continuing to grow by around 80 million
people per year.
But whether we have 500 million people or one trillion, we still have only one
planet, which has a finite level of resources. Considering our population will
continue to rise for some time, how do we accommodate everyone? The answer
comes back to resource consumption. People around the world consume resources
differently and unevenly. An average middle-class American consumes 3.3 times
the subsistence level of food and almost 250 times the subsistence level of
clean water. So if everyone on Earth lived like a middle class American, then
the planet might have a carrying capacity of around 2 billion. However, if
people only consumed what they actually needed, then the Earth could
potentially support a much higher figure.
But we need to consider not just quantity but also quality—Earth might be able
to theoretically support over one trillion people, but what would their quality
of life be like? Would they be scraping by on the bare minimum of allocated
resources, or would they have the opportunity to lead an enjoyable and full
life?
Perhaps Ghandi was right when he said ‘The world has enough for everyone's
need, but not enough for everyone's greed’.
Considering that people in developed, westernised countries are not only the
highest consumers of all resources, but also the largest producers of waste, it
might be time to take stock of our own consumption patterns, and consider what
part we can play in ensuring a healthy future not only for Earth, but everyone
on it.
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Q3 Life forms: The phraseology may not be accurate. "Your skin is your
largest organ. And it’s teeming with trillions of microorganisms, like
bacteria, fungi, and viruses. These invisible life-forms are known as the skin
microbiome. They’re an important part of your overall health." even the brain
has neutrons. So they are life and death of any species.
KR IRS 17 6 23
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Q3 Hummingbird correction: other also do but the difference is: "The
hummingbird is the only bird that can fly backwards and upside down without
relying on the wind. Other birds like warblers, herons, flycatchers, chickens,
quails, and pheasants can fly backward, but only for short distances or with
the help of the wind. The hummingbird's unique wing design allows it to hover
in mid-air and move in any direction.
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On Fri, 16 Jun 2023 at 19:45, 'gopala krishnan' via iyer123
<[email protected]> wrote:
CULTURAL QA 06-2023-17
Q1 Is it necessary to use the dryer witha front load washer?
A1 Marcus Moore, HVAC Superintendent(2019–present)9m
No,a dryer is optional with a front load or top load washer.
2nd answer-Gopala Krishnan, Former AssistantGeneral Manager 1996-2004 at
Department of Telecom (1966–2004)0y
I am writing thisanswer from Chennai, India. The best washed clothes after
washing will have atleast 30% water with it. After using dryer, 20% water will
be removed andweight of clothes is reduced. The weightof the cloth on clothes
line is reduced, and drying will be more quick.
Especially inwinter when rain fall is continuous , dryer is a big advantage.
The dryer ismore effective in semi- automatic machines.
It is a practice torun dryer twice in automatic washing machines so that 95%
water is removed from clothes.
3rd answer- Claire Jordan, Worked at NationalHealth Service (NHS)4y
Yes.Virtually every household in the UK has one.
Q2 Why does an airplane increase itsaltitude during the flight?
A2 Vishnu Ravi, Aviation Enthusiast |Content Creator 8h
Airplanes soar togreater altitudes during flight for a multitude of compelling
reasons:
Fuel Efficiency: One cannot overstate thesignificance of fuel efficiency. As
aircraft ascend to higher altitudes, thethin air significantly diminishes drag,
resulting in reduced fuel consumptionwhile maintaining optimal speed.
Enhanced Speed: The higher an airplane climbs,the thinner the atmosphere
becomes, enabling it to slice through the air withheightened efficiency and
swiftness. This empowers planes to achieve greaterspeeds and reach their
destinations in shorter timeframes.
Weather System Avoidance: By ascending toheights of 30,000 feet and beyond,
aircraft gain the advantage of evadingturbulent weather systems. This ensures a
smoother and more comfortable journeyfor passengers and crew alike.
Extended Emergency Response Time: Elevating togreater altitudes grants pilots
valuable moments to address emergencysituations or identify suitable landing
spots. Unlike light aircraft cruisingat 10,000 feet, the increased altitude
provides an enhanced window ofopportunity for resolution.
Weight Optimization: As planes ascend into theskies, the weight distribution
undergoes significant changes. The burning ofjet fuel, weighing approximately
6.7 pounds per gallon, leads to a reduction infuel weight as the flight
progresses. Combined with the reduced resistance inthe thinner atmosphere at
higher altitudes, this facilitates improved overallperformance.
Optimal Altitude Adjustment: When a flightcommences, there exists an ideal
altitude that ensures peak performance basedon the aircraft's weight. However,
as the journey progresses and fuel isconsumed, the weight distribution alters,
necessitating adjustments to maintainthe optimum altitude for maximum
efficiency.
While flyingat higher altitudes offers numerous advantages, it is imperative to
acknowledgethe inherent risks involved. For instance, theeffectiveness of
aerodynamic controls and natural aerodynamic damping reliesheavily on indicated
airspeed (IAS) and experiences limited variation.Consequently, as altitude
increases, the ability of aerodynamic flight controlsto influence the
aircraft's trajectory or recover from disruptions graduallydiminishes.
Q3 What are some mind blowing facts thatmost people don't know?
A4 Fact sky, Answered by Krishna Kamat,8h
Every day the worldpopulation is growing about 2,00,000. So, can you guess how
much pressure weare putting on this Earth?
There are more lifeforms living on your skin than there are people on the
planet.
Hummingbirds are the only known birds that can also flybackwards.
The shortest living animal in the worldis the Mayfly. Its entire adult lifespan
is just 24hrs.
The world’s first computer mouse was wooden, not plastic.
Google receivesmore than 99,000 searches every second.
India tops the list of Facebook users, having 329.65million people active on
Facebook.
Q4 Can a pilot fly without a co-pilot?
A4 Rebecca Williams, Experience inAviation15h
Most commercialaircraft that carry passengers or cargo require two pilots in
thecockpit: acaptain and a co-pilot (or first officer). The captain is the
pilot-in-commandand has the ultimate authority and responsibility for the
flight. The co-pilotassists the captain and shares some of the duties and tasks
of flying theplane. Both pilots are qualified and trained to fly theaircraft,
and they usually alternate between flying and monitoring roles duringdifferent
segments of the flight.
Having twopilots ensures that there is always a backup in case one of them
becomesincapacitated or unable to perform their duties. It alsoallows for
better workload management, situational awareness, communication,and decision
making. Two pilots can also handle complex or emergency situationsmore
effectively than one.
Some smaller or simpler aircraft may be certified forsingle-pilot operation,
which means that they can be flown safely by one pilotonly. These aircraft
usually have less sophisticatedsystems and lower performance than multi-crew
aircraft, and they may have someautomation or technology to assist the pilot.
Some examples of single-pilot aircraft are the Cessna 208Caravan, the
Beechcraft King Air, or the Cirrus Vision Jet.
When the flight isconducted under certain conditions or regulations that allow
for single-pilotoperation. For example, somecountries or regions may allow
single-pilot operation for certain types offlights, such as private, charter,
or cargo flights, as long as the pilot meetscertain requirements and follows
certain procedures.
Q5 What is the most nutritious food forseniors?
Recipes and Food, FoodLovers | Healthy Eaters | Taste Lovers Jun 3
As seniors age,their nutritional needs change. They require fewer calories but
still need allthe essential nutrients to maintain good health. The key is to
eat a variety ofnutrient-dense foods that provide optimal nutrition without
excess calories.Here are some of the most nutritious foods for seniors:
1. Fatty fish: …
2. Leafy greens: Dark, leafy greens such as spinachand kale are rich in
vitamins A, C, and K, as well as calcium, iron, andantioxidants. They can help
reduce the risk of chronic diseases such as cancerand cardiovascular disease.
3. Berries: Berries such as blueberries, strawberries,and raspberries are rich
in antioxidants, which can help prevent damage tocells and reduce the risk of
chronic diseases. They are also a good source offiber.
4. Whole grains: Whole grains such as brown rice,quinoa, and whole-wheat bread
are rich in fiber, vitamins, and minerals. Theycan help reduce the risk of
heart disease, diabetes, and certain cancers.
5. Nuts and seeds: Nuts and seeds such asalmonds, walnuts, chia seeds, and
flaxseeds are rich in healthy fats, protein,and fiber. They can help lower
cholesterol and reduce the risk of heartdisease.
6. Yogurt: Yogurt is a good source of calcium,vitamin D, and probiotics, which
can help improve digestion and boost theimmune system. Choose plain, low-fat
yogurt to avoid added sugars.
7. Legumes: Legumes such as beans, lentils, andchickpeas are rich in protein,
fiber, and essential vitamins and minerals. Theycan help reduce the risk of
heart disease, diabetes, and certain cancers.
8. Lean protein:
By incorporatingthese nutrient-dense foods into their diet, seniors can improve
their overallhealth and reduce the risk of chronic diseases. It is important to
consult witha healthcare provider or registered dietitian to determine the
appropriatenutrient intake for each individual.
All the above QA are from Quora website on 17-06- 2023.
Quora answers need not be 100% correct answers .
Compiled and posted by R. Gopala krishnan, on 17-06-2023
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