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How It's Made : Measuring Tape | Discovery Science Hindi |

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Discovery Science Hindi | Wires And Cables|How It's Made|Discovery Science India|national geographic

Science - Fibre to Fabric - Wool - Hindi

This video explains the importance of wool and properties of wool clothes. It also gives clear idea about how wool yarn is obtained from sheep though different steps like shearing, sorting, scouring, carding etc.

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unit conversion trick in hindi

unit conversion trick ,unit conversion trick in hindi
Useful technique for converting units in science and mathematics is presented
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Series Description: Mathematics play a very important role in our everyday life, even if it may not seem that way as soon as you step foot outside the classroom. Get tips on solving different types of math problems with help from a high school math tutor and teacher in this free video series.
EASY Unit Conversion in the Metric System - This simple extra help video tutorial explains the metric system and how to make simple metric conversions. I show you the metric number line and how to use it to convert between units. Tune in for a quick lesson on how easy the metric system really is. It is also considered are of the international system of units.

Maths - लम्बाई मापना - Measurement Length - Hindi

The video explains how to measure length. It explains the relation between different units of length and also shows the conversions (e.g. cm to mm, cm to m, m to cm etc.)
To download cool applications to practice length, please visit

Next, learn how to add length and learn decimal addition: Length addition at

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समुद्र कितना गहरा है | How deep is Ocean in hindi

Discovery :Most scientists agree that the atmosphere and the oceans accumulated gradually over millions and millions of years with the continual 'degassing' of the Earth's interior.
According to this theory, the ocean formed from the escape of water vapor and other gases from the molten rocks of the Earth to the atmosphere surrounding the cooling planet.
After the Earth's surface had cooled to a temperature below the boiling point of water, rain began to fall—and continued to fall for centuries. As the water drained into the great hollows in the Earth's surface, the primeval ocean came into existence. The forces of gravity prevented the water from leaving the planet.
The history of Earth concerns the development of the planet Earth from its formation to the present day. Nearly all branches of natural science have contributed to the understanding of the main events of the Earth's past. The age of Earth is approximately one-third of the age of the universe. An immense amount of geological change has occurred in that timespan, accompanied by the emergence of life and its subsequent evolution.
Earth formed around 4.54 billion years ago by accretion from the solar nebula. Volcanic outgassing probably created the primordial atmosphere and then the ocean; but the atmosphere contained almost no oxygen and so would have been toxic to most modern life including humans. Much of the Earth was molten because of frequent collisions with other bodies which led to extreme volcanism. It was quite hot the time of formation. As the planet started to cool, clouds formed. Rain formed the oceans. The thunderstorms and torrential rain may have started as early as 4.4 Ga.
And the rain lasted for many years.
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. If Mount Everest, the highest mountain on Earth, were placed at this location it would be covered by over one mile of water.
The first depth measurements in the Mariana Trench were made by the British survey ship HMS Challenger, which was used by the Royal Navy in 1875 to conduct research in the trench. The greatest depth that they recorded at that time was 8,184 meters (26,850 feet).
Marine pollution occurs when harmful, or potentially harmful, effects result from the entry into the ocean of chemicals, particles, industrial, agricultural and residential waste, noise, or the spread of invasive organisms. Most sources of marine pollution are land based. The pollution often comes from nonpoint sources such as agricultural runoff, wind-blown debris and dust. Nutrient pollution, a form of water pollution, refers to contamination by excessive inputs of nutrients. It is a primary cause of eutrophication of surface waters, in which excess nutrients, usually nitrogen or phosphorus, stimulate algae growth.
Many potentially toxic chemicals adhere to tiny particles which are then taken up by plankton and benthos animals, most of which are either deposit or filter feeders. In this way, the toxins are concentrated upward within ocean food chains.
When pesticides are incorporated into the marine ecosystem, they quickly become absorbed into marine food webs. Once in the food webs, these pesticides can cause mutations, as well as diseases, which can be harmful to humans as well as the entire food web.
Toxic metals can also be introduced into marine food webs. These can cause a change to tissue matter, biochemistry, behaviour, reproduction, and suppress growth in marine life. Also, many animal feeds have a high fish meal or fish hydrolysate content. In this way, marine toxins can be transferred to land animals, and appear later in meat and dairy products.


In this video we capture :
-Formation of Earth
-First Rain on Earth
-Formation of Ocean
-Mariana trench depth
-Pollution

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हमारा ब्रह्मांड कितना बडा है ? | How Big is Our Universe in Hindi

The Universe is all of time and space and its contents. It includes planets, moons, minor planets, stars, galaxies, the contents of intergalactic space, and all matter and energy. The observable universe is about 27 billion parsecs (93 billion light-years) in diameter. The size of the entire Universe is unknown, but there are many hypotheses about the composition and evolution of the Universe.

The earliest scientific models of the Universe were developed by ancient Greek and Indian philosophers and were geocentric, placing the Earth at the center of the Universe.[14][15] Over the centuries, more precise astronomical observations led Nicolaus Copernicus (1473–1543) to develop the heliocentric model with the Sun at the center of the Solar System. In developing the law of universal gravitation, Sir Isaac Newton (NS: 1643–1727) built upon Copernicus's work as well as observations by Tycho Brahe (1546–1601) and Johannes Kepler's (1571–1630) laws of planetary motion. Further observational improvements led to the realization that our Solar System is located in the Milky Way galaxy and is one of many solar systems and galaxies. It is assumed that galaxies are distributed uniformly and the same in all directions, meaning that the Universe has neither an edge nor a center. Discoveries in the early 20th century have suggested that the Universe had a beginning and that it is expanding at an increasing rate. The majority of mass in the Universe appears to exist in an unknown form called dark matter.

The Big Bang theory, the prevailing cosmological model describing the development of the Universe, states that space and time were created in the Big Bang and were given a fixed amount of energy and matter that becomes less dense as space expands. After the initial expansion, the Universe cooled, allowing the first subatomic particles to form and then simple atoms. Giant clouds later merged through gravity to form stars. Assuming that the standard model of the Big Bang theory is correct, the age of the Universe is measured to be 13.799±0.021 billion years.

There are many competing hypotheses about the ultimate fate of the Universe and about what, if anything, preceded the Big Bang, while other physicists and philosophers refuse to speculate, doubting that information about prior states will ever be accessible. Some physicists have suggested various multiverse hypotheses, in which the Universe might be one among many universes that likewise exist.[
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सबसे विचित्र खोज l Strange Discovery in Hindi l World's Roundest Object - सबसे गोल चीज़

What is the roundest object in the world? How much is the world's roundest object worth ? What is its use ?
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A perfect sphere of silicon is being made to solve the ‘kilogram problem.’ It is the roundest man made object. Raw material to make this is worth 1 Million euro means approx 8 Crore. Now what is kilogram problem ? To understand we will have to go in past. What is one Kg ? In 1799 standard kg weight was defined. It was equal to the weight of 1 litre water at 4 degree Celsius. At 4 degree C water has the highest density. To measure 1 kg with water every-time, was not practical. So equivalent pure platinum 1 kg weight was made standard. In 1889 it was replaced with more stable weight made of platinum-iridium alloy. It still resides in Paris, France at Bureau of weights and measures.
It is called international prototype kilogram. 40 copied of it were also made to send all over the world in various countries for national weight standardisation. They were collected in 1948 to compare their weight with international prototype kilogram. Their weight was drifting from the standard weight. This was not acceptable. How a unit can be standard, if it change with time. This is called ‘kilogram problem.’ This will not only change the definition of 1 kg but also affect other derived units like Newton, Watt, Volt etc.

There are seven fundamental units defined by International System of Units (SI Units).
The meter (symbol: m), used to measure length.
The kilogram (symbol: kg), used to measure mass.
The second (symbol: s), used to measure time.
The ampere (symbol: A), used to measure electric current.
The kelvin (symbol: K), used to measure temperature.
The mole (symbol: mol), used to measure amount of substance.
The candela (symbol: cd), used to measure light intensity.
Kilogram is the only fundamental unit defined by physical object. All other fundamental units have been defined by the concept means ‘physical properties’ that never change. It means, their value can be verified by anyone, anytime. Now, attempts are being made to define 1 kg with concept not by object. Among those attempts, one is International Avogadro Project. They are trying to define 1 kg by the weight of specific no of atoms of pure Silicon-28 crystal. Pure silicon is free from structural defects, dislocations and impurities. To define this best shape is sphere, because to calculate its volume only one dimension is required, its diameter.
A second, competing method to determine a standard measurement for the kilogram is the watt balance also known as “Kibble balance”-- a system tied to Earth's gravitational pull on a kilogram and the force needed to counteract it. We may soon define 1 kg by concept, eliminating all errors associated with objects.


Duniya ki sabse gol cheez kya hai ? ye kitni mehngi hai ? Ye kaha use hoti hai ? chalo pta kre

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⬤ Supermassive Black holes explained

🌙 How to get Infinite Energy from Moon

🌌 Stephen Hawkingl-Universe का सबसे जिद्दी व्यक्ति' l Inspirational Story

⭐ Pole Star Revealed (Hindi)

🌌 Aurora - विनाशकारी सुन्दरता | Northen Lights

🌍 Dont Save Earth (Hindi)

शर्तिया E=MC² का ये हैरानीजनक राज़ आप नहीं जानते

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Further Study:

* Roundest objects in the world created

* Kilogram


* 'World's Roundest Object' May Provide New Definition Of Standard Kilogram


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Credits -

** Images -

# CGKilogram.jpg by Greg L ( Licensed under Creative Commons Attribution-Share Alike 3.0 Unported
# Prototype kilogram replica.JPG by Japs 88 ( Licensed under Creative Commons Attribution-Share Alike 3.0 Unported
# Cesium.jpg by Dnn87 ( Licensed under Creative Commons Attribution-Share Alike 3.0 Unported
# Silicon sphere for Avogadro project.jpg by ‘The Commonwealth Scientific and Industrial Research Organisation of Australia’ ( licensed under Creative Commons Attribution-Share Alike 3.0 Unported, 2.5 Generic, 2.0 Generic and 1.0 Generic
# Silicon (14 Si).jpg by ‘Hi-Res Images of Chemical Elements’ ( Licensed under Creative Commons Attribution 3.0 Unported

** Background Music Credits -
# music by audionautix.com
# Odd News by Twin Musicom (twinmusicom.org), Licensed under CC BY 3.0 US

Discovery of Dark Matter in Hindi

दोस्तों यह Dark Matter की एक वीडियो है जिसमें मैं बता रहा हूं कि Dark matter क्या है।
यह किन particles से मिलकर बना हो सकता है। और यह universe में कहां exit करता है और हमारी Galaxy पर इसका क्या effect पड़ रहा है? और भी बहुत कुछ ।तो अगर आप dark matter के बारे में detail में जानना चाहते हैं तो इस वीडियो को जरूर देखें।
मैं आशा करता हूं कि आपको यह वीडियो पसंद आएगा

Friends, this is a video of dark matter (in Hindi) in which I am telling you what is dark matter. It can be made up of which particle. Where do the exit at the Universe and its impact on our Galaxy?and many more about dark matter. So if you want to know about the details of the dark matter, then definitely watch this video. I hope you like this video.

credits of this video:-

Video Images and photos Credit:-
ESA/Hubble(M. Kornmesser & L.L. Christensen),(
),
ESO/L.Calçada/José Francisco,( ),
CERN( ),
Pixabay ( ),
some other footaage credit- Georgetown University, glass universe, wikimedia, wikipedia etc.
vectors of this video:-

background music-

Lightless Dawn by Kevin MacLeod is licensed under a Creative Commons Attribution license (
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and Jingle Punks

REFERENCE: -
Vera Rubin:-

Spectrograph:-

Galaxy rotation curve:-

Gravitational lens:-

Electromagnetic radiation:-

Electromagnetic spectrum:-

Particle physics:-

Large Hadron Collider (LHC):-

Dark matter:-




Narrated, Edit, Designed, Research of this video by Ravindra Kumar

If you have in your mind any questions and suggestions about this video you can ask/tell me by the comment or email.
my email is- sahuravendra0@gmail.com

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6: Antimatter and Antiparticles Explained in Hindi


5: Gravitational Waves, LIGO, and LIGO-INDIA Explained in Hindi:-


4: Black Holes Explained in Hindi Part-1:-


3: चींटियाँ अपना खाना कैसे ढूंढ लेती हैं। How do ants find their food?


2: (Hindi-Eng)Nuclear Fission | Nuclear Energy Explained: How does it work? 2/3


1: (Hindi-Eng)पतंग के उड़ने का कारण how do fly kites?


0: (Hindi)Why atmosphere is not present on the moon? चंद्रमा पर वायुमंडल उपस्थित क्यों नहीं है। HD


Discovery Hit by Kevin MacLeod is licensed under a Creative Commons Attribution license (
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Artist: cosmos videos in Hindi, comos, physics, universe, universe science,

How to read measurement tape in Hindi || Inch fraction change in Millimeters

Inch fraction change in Millimeters
How to read measurement tape in Hindi. How to study measuring tape in hind
Dosto es video me hm sikhege ki 1inch me 8sut hote h or jo fraction segment hote h uske bare me bhut acche se btaya h i hope you will like my video

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Higgs Boson Discovery Wins Nobel Prize for Physics

Peter Higgs and Francois Englert win Nobel Prize in Physics. Want to know what makes the Higgs Boson Nobel Prize-worthy? Brian Greene explains.

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समय भ्रम या सच्चाई what is time in Hindi | illusion or reality

This is SHYAM TOMAR and welcome to Tech & Myths
#T&M24

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In this Episode, we'll know about time.
Time is a measure in which events can be ordered from the past through the present into the future, and also the measure of durations of events and the intervals between them. Time is often referred to as the fourth dimension, along with the three spatial dimensions


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What is Dark Matter and Dark Energy?

What is dark energy? What is dark matter? Well, if we knew exactly we would have a nobel prize – we know that they exist though. So what do we know about those strange things?

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Interesting Facts of Honey Bee In Hindi

Interesting , Amazing Honey Bee Facts

How simple ideas lead to scientific discoveries

Adam Savage walks through two spectacular examples of profound scientific discoveries that came from simple, creative methods anyone could have followed -- Eratosthenes' calculation of the Earth's circumference around 200 BC and Hippolyte Fizeau's measurement of the speed of light in 1849.

Have you ever seen an atom?

Scientists at the University of California Los Angeles have found a way to create stunningly detailed 3D reconstructing of platinum nanoparticles at an atomic scale. These are being used to study tiny structural irregularities called dislocations.

Read the paper here:
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The illusion of time : past, present and future all exist together

This video is from the documentary The Fabric of The Cosmos - for nonprofit educational purposes.
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Please don't be misled by some comments below. This video does not say we can see future. It says Einstein's mathematical theory -which we later tested by clock experiment- also tells us that future and past always exist like the present! However, this does not necessitate pre-destination. Now is not deterministic as we know from Quantum Mechanics, so neither future nor past! Click to understand Quantum Mechanics. Wave functions evolve as time goes by. However, time does not collapse wave functions; observation collapses wave functions. Your wave function (which represents you) corresponding to your future has not collapsed yet. It will collapse in the future. As things in your life are probabilistic right now, they are probabilistic in the future too. Your past wave function has collapsed though. But your future one exists as a probability cloud in a sense. Here is a discussion I had with Avicenna10 about the topic (copy paste address below):

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Accuracy of atomic clocks:
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A comment from my exchange with axypolyas on why illusion of time does not require predestination:

+axypolyas Not sure why you are bothered by all these; perhaps it is because of your choices in life. Let me tell you something which will bother you more. You might know already, however, anyone who is reading this exchange will highly likely not.

The scientific description of you, me and everything is energy. We don't know what energy is. We can quantify it, however, in essence what is it? we have no idea. And energy takes different forms, like elementary particles, which in turn become atoms, molecules and part of the end result is us. We know energy is governed by laws and constants which naturally takes us to the inevitable conclusion: we are governed by those constants and laws. Before discovery of quantum physics, this would mean we are completely deterministic objects. Quantum physics showed us that we are not 100% deterministic. We are limited by laws but still we are unpredictable (we can calculate probabilities of what we might do next, but we don't know what we will do next until we do it). What do all these mean for us? Who are we? or what are we? Why do atoms and molecules pile up and make us? to live longer? All the atoms in our bodies are almost 15 billions of years old. What we call life is just another state in which they continue existing; nothing more; nothing special about it. How can we make sense of all these? Can we make sense of all these? If we are only, and only, condensed energy, there is no such a thing as making sense of things. There is only energy going through one state to another state mindlessly. Pretty scary and dark explanation of our existence, is the pure scientific one.

Science is only a tool; only a methodology we use to make sense of the universe. It does not tell us why things are the way they are. It tells us how we can construct theories and how we can use methods to test them, so that, we can do all these in an objective way. Science is an extremely limited way of looking into existence. Are my feelings objective? No. Are they scientific? No. Or, should I greet my neighbour every morning? Should I have an extra spoon of ice cream today? Or why do we do science? Do we have to do science? Say for our survival? Our survival has no meaning given particles making up our physical bodies existed for billions of years and they will continue to exist, perhaps longer.

I will jump to my personal understanding, rather than destroying ourselves using science. To me, existence of The Creator makes more sense than anything else, including my own existence. The Creator, who logically must (and interestingly described as such in Islam which I have chosen as a path to follow) be All-Knowing, All-Powerful, capable of creating a free agent (my soul for example) with life, creating a universe in which those free agents can grow up, examine, study, learn, make sense of it... freely... is the only logical answer I can think of. We don't see the Creator, or souls, or anything which would force us to believe and accept. Creator made us free and as part of making that choice freely, we will always be bothered by our existence, but we will never find an answer. That will remain as a matter of choice and it has always been like that.

The knowledge of truth as such is wonderful, but it is so little capable of acting as a guide that it cannot prove even the justification and the value of the aspiration toward that very knowledge of truth. Here we face, therefore, the limits of the purely rational conception of our existence. -- Albert Einstein

Subatomic Particles Explained In Under 4 Minutes

Although there’s no direct evidence of dark matter, things strongly suggest that it exist. Let’s explore the world of subatomic particles.

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Scientists May Have Finally Detected A Dark Matter Signal

“Could scientists have finally spotted a signal from dark matter—the elusive, theoretical substance that’s thought to make up much of the universe?”

Could Mystery Signal be First Detection of Dark Matter?

“Through the analysis of light from distant galactic clusters, astronomers have detected a mysterious signal that they’re having a hard time explaining.”

Sterile neutrino

“Sterile neutrinos (inert neutrinos) are hypothetical particles (neutral leptons – neutrinos) that do not interact via any of the fundamental interactions of the Standard Model except gravity.”

Regular Neutrinos


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How Can You See an Atom?

This week Reactions takes a close up look at the science of how we can see an atom. Since ancient Greek times, philosophers and scientists have tried to figure out what an atom looks like. For a couple thousand years, humans could only speculate on the structure and other properties of the smallest unit of matter. It wasn't until the 1980s that chemists could see individual atoms. Bestselling author Sam Kean takes us through the nearly 2,400-year quest to see the atom in a new episode of our Legends of Chemistry series.

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Credits:
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Writer/Host: Sam Kean
Scientific/historical consultants:
Darcy Gentleman, Ph.D.
Chemical Heritage Foundation
Lead Writer: Noel Waghorn
Executive Producer: Adam Dylewski

Science - Measurement - What is measurement - Hindi

This short science video in Hindi is meant for upper primary class children (age 11-13 years). This video explains what is the need of measurement - by taking common examples. It starts with estimation, then the primitive methods of measurement and then highlights on a need for consistent unit of measurement. It refers to a funny story - The eccentric King.

Mount Everest - in Hindi (Full Information about the Mount Everest and Himalaya)

Welcome to The Knowledge. The documentary is about the mount Everest (Sagarmatha), himalaya mountain, Nepal, Gurkha regiment, British raj, chomolungma, Tibet and top of the world. I am glade to tell you the whole story of Everest and Himalaya Safari. The episode is full of interesting information about the Everest, ts History and Geography. I'm sure you will like the documentary and enjoy it. Don't forget to like, share, Subscribe and comments us.
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Dark Times by Kevin MacLeod is licensed under a Creative Commons Attribution licence (
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