Today I Learn

07 Dec 2023 02:57

What is longest railway platform of the world?

The longest railway platforms are: Gorakhpur railway station, Uttar Pradesh, India:1,366.33 m (4,483 ft) (longest in the world) Kollam Junction, Kerala, India:1,180.5 m (3,873 ft) Kharagpur, West Bengal, India: 1,072.5 m (3,519 ft).

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03 Dec 2023 12:43

Why do we have eyebrows?

Their main function is hypothesized to prevent sweat, water, and other debris from falling down into the eye socket, but they are also important to human communication and facial expression.

It is not uncommon for people to modify their eyebrows by means of hair addition, removal and makeup.

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02 Dec 2023 13:59

What is deepest part of ocean ?

The Challenger Deep in the Mariana Trench is the deepest known point in Earth's oceans.

In 2010 the United States Center for Coastal & Ocean Mapping measured the depth of the Challenger Deep at 10,994 meters (36,070 feet) below sea level with an estimated vertical accuracy of ± 40 meters.

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29 Nov 2023 03:28

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28 Nov 2023 13:13

Why do house lizards hate egg shells?

If you place cracked eggshells around the house, in corners, and in windows, the occurrence of lizards should decrease noticeably. 

Lizards associate the broken shells with larger predators such as birds and larger reptiles.

Peacock feathers. This works on the same principal as the egg shell idea.

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24 Nov 2023 02:56

What planet rotate clockwise in our solar system?

Venus and possibly Uranus are the exceptions to the counterclockwise rotations of the planets. 

Venus travels around the sun once every 225 Earth days but it rotates clockwise once every 243 days.

This pecular combination gives it a day with respect to the sun of 117 Earth days.

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21 Nov 2023 15:19

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21 Nov 2023 15:15

The world’s 7.6 billion people represent just 0.01% of all living things, according to the study. Yet since the dawn of civilisation, humanity has caused the loss of 83% of all wild mammals and half of plants, while livestock kept by humans abounds.

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20 Nov 2023 03:39

Which ocean is the Bermuda Triangle in?

The Bermuda Triangle, also known as the Devil's Triangle, is a loosely defined region in the western part of the North Atlantic Ocean, where a number of aircraft and ships are said to have disappeared under mysterious circumstances.

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17 Nov 2023 02:59

What mineral is the hardest?

As it says in Mohs scale, the diamond is always at the most top of the scale, being the hardest mineral.

There are ten minerals in Mohs scale, talc, gypsum, calcite, fluorite, apatite, orthoclase, quartz, topaz, corundum, and for last and the hardest, diamond.

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15 Nov 2023 04:00

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13 Nov 2023 14:03

Meaning Of the Day

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12 Nov 2023 04:37

​​What is the Fastest Bird In The World?

Flight has always fascinated us. The natural speed and agility of your average songbird is remarkable enough, but some birds take the power of flight to another level.

The fastest bird in the world is the migratory peregrine falcon. These raptors feed on other birds like pigeons and shorebirds that they capture in flight at amazing speeds of up to 200 miles per hour.

They achieve this speed by diving or stooping from above, using a combination of powerful flight muscles, perfectly streamlined form, and good old gravity.

The Peregrine Falcon is the fastest bird in the world when it comes to the speed it can reach whilst diving.

They can reach a staggering 200 mph (389 km/h), making them by far the fastest bird by airspeed velocity in the world.

This doesn't just mean that peregrine falcons are the fastest bird in the world; they are actually the fastest animal in the world.

Peregrine Falcons utilise this impressive speed to catch their prey and perform precise manoeuvres.

They may attack their prey anywhere from a few hundred metres to several kilometres away and will drop out the sky, usually using this force to deliver a significant blow to their prey.

They will sometimes catch their prey with their large, powerful talons too.

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08 Nov 2023 13:46

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07 Nov 2023 08:01

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05 Dec 2023 02:41

What is the shortest sentence that has all 26 letters in the English alphabet?

Pack my box with five dozen liquor jugs.

This has thirty-two letters and repeats the letters i, e and o.
Brick quiz whangs jumpy veldt fox. 

The quick brown fox jumps over the lazy dog.

It contains three e's, two h's, four o's two r's, two t's, and two u's.

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03 Dec 2023 03:13

Is the earth's rotation slowing down?

Yes it is, due to a transfer of Earth's rotational momentum to the Moon's orbital momentum as tidal friction slows the Earth's rotation.

That increase in the Moon's speed is causing it to slowly recede from Earth(about 4 cm per year), increasing its orbital period and the length of a month as well.

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01 Dec 2023 06:05

What is melting point of human bones ?

The exact composition of these compounds varies upon the type of bones being used, but generally the formula for bone ash is: Ca5(OH)(PO4)3.

Bone ash usually has a density around 3.10 g/mL and a melting point of 
1670°C (3038 °F).

Most bones retain their cellular structure through calcination.

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29 Nov 2023 03:08

What Happens to Your Body When You're Kissing ?

The physical thrill may prompt your brain to cue up dopamine, a neurotransmitter associated with pleasure.

At the same time, other parts of your brain are shutting down negative emotions.

Your lip locking may also have prompted your pituitary gland (and his) to release oxytocin, the "bonding hormone."

You two might already be forming an emotional attachment.

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25 Nov 2023 03:16

How Long Does it Take Sunlight to Reach the Earth?

In space, light travels at 300,000 kilometres (186,000 miles) per second.

Even at this breakneck speed, covering the 150 million odd kilometres (93 million miles) between us and the Sun takes a considerable time.

And eight minutes is still very little compared to the five and a half hours it takes for the Sun's light to reach Pluto.

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22 Nov 2023 12:31

Can you walk if there is no friction?

You could not walk without 
the friction between your shoes and the ground.

As you try to step forward, you push your foot backward. 

Friction holds your shoe to the ground, allowing you to walk. Consider how difficult it is to walk on slippery ice, where there is little friction.

Walking without friction is like walking on a treadmill, you won't be able to go anywhere, but just slip on the same exact position.

Matter of fact, that you won't be able to walk on even a treadmill. But only humans won't be affected, even the animals would be affected and for some like snakes, moving is impossible.

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21 Nov 2023 15:17

Are Nonstick Pans Safe?

Primarily, this means not overheating the pan. Overheating nonstick panscauses their coating to break down, which can result in the release of surface particles and/or toxic gases.A specific concern is PFOAs (perfluorooctanoic acids), one of the chemicals used to make somenonstick pan coatings, includingTeflon.

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21 Nov 2023 15:13

Where are bees not found?

They are found on every continent except Antarctica, in every habitat on the planet that contains insect-pollinated flowering plants. Bees are adapted for feeding on nectar and pollen, the former primarily as an energy source and the latter primarily for protein and other nutrients.

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19 Nov 2023 02:21

​​Why do Military Aircraft often fly in formation?

Military aircraft often fly in formation for several reasons, which include:

Tactical Advantage: Flying in formation provides tactical advantages during combat operations.

Formation flying allows for better coordination between aircraft, facilitating communication, situational awareness, and the ability to execute complex maneuvers effectively.

By flying in close proximity, military aircraft can concentrate their firepower, provide mutual support, and enhance their defensive capabilities.

Mutual Protection: Formation flying provides mutual protection for aircraft. The close proximity allows for faster response times and immediate support in case of an attack.

It increases the chances of detecting threats and enables coordinated defensive maneuvers, such as evasive actions or countermeasures deployment.

Improved Efficiency: Formation flying can enhance fuel efficiency and extend the range of aircraft.

By flying in close formation, aircraft can reduce drag and take advantage of the aerodynamic benefits of drafting.

This can result in fuel savings and longer operational endurance, which is especially crucial for military missions that require extended flight durations.

Training and Skill Development: Formation flying is an essential component of military pilot training.

Pilots learn how to maintain precise positioning and spacing, communicate effectively, and operate as a cohesive unit. Formation flying skills are critical for air combat situations and aerial displays, where precise coordination is necessary.

Visual Deterrence and Symbolism: Formation flying can have a psychological impact by visually representing strength and unity.

Military aircraft flying in formation during public events or airshows can serve as a demonstration of military power, teamwork, and national pride.

It's important to note that while formation flying has its advantages, it also requires significant training, skill, and strict adherence to safety protocols to ensure the safety of the pilots and the aircraft involved.

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16 Nov 2023 02:16

​​What is Hawk-Eye Technology used in different sports?

Hawk-Eye, a technology, that is a computer system is used in numerous sports like cricket, tennis, football, badminton, and volleyball.

It is usually used to track the trajectory of the ball and is used to display a profile of a statistical path as the moving image to take the decision over the issues that arise during when the game takes place.

The word “Hawk” itself means that something that is vigilant, watchful and has extremely keen sight.

The present study aims at using the hawk-eye technology in sports with regard to the latest trends in the sports arena.

It is most commonly used in technologies in different sports. It is put up for a variety of uses like, providing a way to collect interesting statistics, to construct very suggestive visual representations of the game that is being played and helping the viewers for a better understanding of the umpire decisions.

The Hawk-Eye is one of such technologies which is considered to be a really the top invention for various sports.

The main idea behind its invention was to monitor the trajectory of the ball during the entire duration of the gameplay. It was developed as a replay system, originally for TV Broadcast coverage.

Even the scenario of the hawk-eye invention and its use was discussed internationally, where they found it to be reliable for the decision.

Hawk-Eye is the first company to receive a FIFA Goal Line Technology (GLT) license.

It is used in sports as this technology allows the officials to make quick and accurate decisions to try and interrupt play as little as possible, for making the game be played fairly.

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14 Nov 2023 02:22

Why do lakes freeze from the top down rather than the bottom up?

The reason why ice forms on the top of lakes and ponds is that once water cools below 39 degrees Fahrenheit, it becomes lighter and less dense the more it cools. This means that water expands as it freezes into ice. As a result, ice takes up more room than the water it was made from.

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13 Nov 2023 04:01

Meaning Of the Day

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09 Nov 2023 01:01

What are some interesting features of the human nervous system?

🔴 The human nervous system can transmit signals at speeds of 100 meters per second.

🔴 The slowest signal transmission occurs inside the skin.

🔴 Every square cm of human skin contains around 200 pain receptors but only 15 receptors for pressure, 6 for cold and 1 for warmth.

🔴 In the human PNS, nerve cells can be threadlike—their width is microscopic, but their length can be measured in meters.

🔴 There are over millions of nerve cells in human CNS, 100 billion neurons in the human brain and around 13,500,000 neurons in the spinal cord.

🔴 Sciatic nerve is the longest and broadest single nerve in the human body.

🔴An optic (cranial) nerve is the fundamental part of the CNS, and the human eye's most significant sensory nerve.

🔴 B Vitamins must be replenished daily as they are only stored in the body in a very small amount.

⬆️ Look at the human nervous system depicted using advanced computing system.

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07 Nov 2023 14:14

​​​​What is the Gel that is applied before an Ultrasound Scan?

Ultrasound is a special form of technology that sends pulsing sound waves at a high frequency deep into the tissue of a patient using a probe or a transducer. The gel is rubbed onto the skin to help the transducer easily glide along the surface. The device can receive and also send sound waves, which then appear as images that are seen on a computer screen. A sonographer looks at the images to make sure that everything appears normal. This is done in real time and the person operating the ultrasound technology can move the transducer or the probe as required to get a fully defined picture of what’s happening beneath skin level. Screenshot images can also be taken and printed out if required.

Ultrasound gel is composed of a mix of propylene glycol and water. Propylene glycol is a synthetic product that is commonly found in hygiene, cosmetic and food products. It is quite sticky and thick. It’s important for it to have a sticky texture so that it stays on your skin and doesn’t drip off when the ultrasound is being performed.
The gel has a shelf life of approximately 5 years if the bottle remains unopened. Once opened, however, it’s recommended that it be used up within 28 days for the purpose of infection control.

Another thing that can get in the way of reducing clear images is static electricity. Ultrasound gel eliminates the static so that the procedure can be done effectively without any risk of static getting in the way.

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05 Nov 2023 05:35

What are glial cells?

✔️The second main type in the nervous system are glial cells.

Glial cells (named from the Greek word for "glue") are non-neuronal cells that provide support and nutrition, maintain homeostasis, form myelin, and participate in signal transmission in the nervous system.

Among the most important functions of glial cells are:
📍to support neurons and hold them in place
📍to supply nutrients to neurons
📍to insulate neurons electrically
📍to destroy pathogens and remove dead neurons
📍to provide guidance cues directing the axons of neurons to their targets.

✍️A very important set of glial cell generate layers of a fatty substance called myelin that wrap around axons and provide electrical insulation that allows them to transmit signals much more rapidly and efficiently.

✍️🧠In the human brain, it is currently estimated that the total number of glia roughly equals the number of neurons, although the proportions vary in different brain areas.

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