Q&A : WHAT IS HAWKING RADIATION

Q&A : CAN 100% RENEWABLE ENERGY POWER THE WORLD

 

CAN 100% RENEWABLE ENERGY 

POWER THE WORLD? - 

FEDERICO ROSEI AND RENZO ROSEI

1,909,956 views

Dec 7, 2017

TED-Ed

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Every year, the world uses 35 billion barrels of oil. This massive scale of fossil fuel dependence pollutes the earth, and it won’t last forever. On the other hand, we have abundant sun, water and wind, which are all renewable energy sources. So why don’t we exchange our fossil fuel dependence for an existence based only on renewables? Federico Rosei and Renzo Rosei describe the challenges.

Lesson by Federico Rosei and Renzo Rosei, directed by Giulia Martinelli.

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Q&A : WHAT IS ANTIMATTER AND WHY ARE WE SEARCHING FOR IT?

WHAT IS ANTIMATTER AND 

WHY ARE WE SEARCHING FOR IT?

745,178 views

Dec 9, 2015

Seeker

4.88M subscribers

Scientists have been looking for antimatter since the early 1920’s. Is antimatter real?

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Physicists Probe Antimatter For Clues To How It All Began

http://www.npr.org/sections/thetwo-wa...

“Matter has a counterpart called antimatter. Each kind of fundamental particle of matter has an antimatter nemesis lurking in the shadows. And true to science-fiction stereotype, if matter and antimatter ever meet, they annihilate in a flash of light.”

 

Scientists trap antimatter long enough to study how it works

http://www.theguardian.com/science/20...

“In science fiction stories, antimatter pops up everywhere as a power source for spaceships or the active ingredient in diabolical bombs. In real life, though, this mysterious substance is elusive and scientists have never had much of it to play around with.”

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Q&A : WHAT’S THE SMALLEST THING IN THE UNIVERSE?

WHAT’S THE SMALLEST THING 

IN THE UNIVERSE? 

JONATHAN BUTTERWORTH

898,482 views

Nov 15, 2018

TED-Ed

15M subscribers

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If you were to take a coffee cup, and break it in half, then in half again, and keep carrying on, where would you end up? Could you keep on going forever? Or would you eventually find a set of indivisible building blocks out of which everything is made? Jonathan Butterworth explains the Standard Model theory and how it helps us understand the world we live in.

Lesson by Jon Butterworth, directed by Nick Hilditch.

 

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Q&A : CAN WE HARNESS THE POWER OF LAVA?

CAN WE HARNESS THE POWER OF 

LAVA? 

JEAN-BAPTISTE P. KOEHL

343,708 views

Jul 29, 2021

TED-Ed

14.8M subscribers

Explore how geothermal energy— the heat in the Earth’s crust— is being used to create renewable electricity and power.

--

While the weather in Iceland is often cold, wet, and windy, a nearly endless supply of heat bubbles away below the surface. In fact, almost every building in the country is heated by geothermal energy in a process with virtually no carbon emissions. So how exactly does this renewable energy work? Jean-Baptiste P. Koehl explores the two primary models for harnessing the planet's natural heat.

Lesson by Jean-Baptiste P. Koehl, directed by Charlotte Arene.

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Q&A : HOW TO MEASURE EXTREME DISTANCES - YUAN-SEN TING

LIGHT SECONDS, LIGHT YEARS, 

LIGHT CENTURIES:

HOW TO MEASURE EXTREME DISTANCES

 - YUAN-SEN TING

2,633,453 views

Oct 9, 2014

TED-Ed

14.8M subscribers

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When we look at the sky, we have a flat, two-dimensional view. So how do astronomers figure the distances of stars and galaxies from Earth? Yuan-Sen Ting shows us how trigonometric parallaxes, standard candles and more help us determine the distance of objects several billion light years away from Earth.

 

Lesson by Yuan-Sen Ting, animation by TED-Ed.

 

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Q&A : WHAT IS BITCOIN MINING?

WHAT IS BITCOIN MINING? 

(IN PLAIN ENGLISH)

2,467,496 views

Jul 12, 2018

99Bitcoins

566K subscribers

 

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Bitcoin mining is the process of updating the ledger of Bitcoin transactions known as the blockchain. Mining is done by running extremely powerful computers (known as ASICs) that race against other miners in an attempt to guess a specific number.

 

The first miner to guess the number gets to update the ledger of transactions and also receives a reward of newly minted Bitcoins (currently the reward is 12.5 Bitcoins).

 

Today, in order to be profitable with Bitcoin mining you need to invest heavily in equipment, cooling and storage. It’s not possible to mine profitably with a PC or a GPU at home. You can calculate your profitability using a Bitcoin mining calculator.

 

0:20 - Bitcoin mining in a nutshell

3:13 - Mining difficulty and block time

4:22 - Evolution of Bitcoin mining hardware

6:30 - Bitcoin mining pools

7:24 - Is Bitcoin mining profitable?

10:41 - Other types of mining

13:14 - Frequently asked Questions

15:20 - Conclusion

 

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Q&A : WHAT IS BITCOIN? - BITCOIN EXPLAINED SIMPLY FOR DUMMIES

WHAT IS BITCOIN?

BITCOIN EXPLAINED SIMPLY FOR DUMMIES

4,574,139 views

Apr 4, 2018

99Bitcoins

566K subscribers

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Bitcoin is the first decentralized digital currency. All Bitcoin transactions are documented on a virtual ledger called the blockchain, which is accessible for everyone to see.

Bitcoin gives you complete control over your money, unlike other assets you own which are regulated by banks and governments. As bitcoin gains more popularity, more and more places accept it as a payment method.

That's Bitcoin in a nutshell. For the complete simple explanation watch this video, here's what I'll cover:

 

0:50 - What is money?

3:10 - Fiat money

3:43 - Fiat money drawbacks

4:25 - Digital money

5:34 - Centralized money issues

7:21 - Enter Bitcoin

7:44 - Bitcoin is transparent

9:13 - Bitcoin is decentralized

9:35 - Bitcoin is digital

9:56 - Why is Bitcoin such big news?

11:45 - Who accepts Bitcoin?

12:05 - Conclusion

 

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Q&A : HOW DO VENTILATORS WORK

HOW DO VENTILATORS WORK? - 

ALEX GENDLER

1,826,091 views

May 21, 2020

TED-Ed

14.7M subscribers

Take a journey into the respiratory system to see how ventilators bypass constricted airways and help damaged lungs send oxygen to the body.

---

In the 16th century, physician Andreas Vesalius described how a suffocating animal could be kept alive by inserting a tube into its trachea and blowing air to inflate its lungs. Today, Vesalius’s treatise is recognized as the first description of mechanical ventilation— a crucial practice in modern medicine. So how do our modern ventilators work? Alex Gendler explains the life-saving technology.

 

Lesson by Alex Gendler, directed by Artrake Studio.

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Q&A : HOW DEEP THE OCEAN REALLY IS

THIS INCREDIBLE ANIMATION SHOWS 

HOW DEEP THE OCEAN REALLY IS

60,600,579 views

Apr 4, 2017

Tech Insider

3.58M subscribers

Just how deep does the ocean go? Way further than you think. This animation puts the actual distance into perspective, showing a vast distance between the waves we see and the mysterious point we call Challenger Deep.

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This Incredible Animation Shows How Deep The Ocean Really Is

 

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Q&A : WHAT'S THAT COLOSSAL STRUCTURE FOUND IN THE MILKY WAY?

WHAT'S THAT COLOSSAL STRUCTURE

FOUND IN THE MILKY WAY?

28 views

Sep 5, 2021

Insane Curiosity

216K subscribers

 

Studying morphology, i.e. the shape of our galaxy ( the milky way), is a difficult thing to do.

Why is that? Because we don't have directed eyesight of our galaxy.

From our position inside the Milky Way, much of its size, contents, and three-dimensional structure is really tricky to figure out.What we currently know is that we live in a spiral galaxy.

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Follow me in this video to get to know more about our fantastic galaxy and its new...Cattail!

Astronomers discovered a new colossal structure, and named it “Cattail”. It's huge.

But it is such a wonder. Before seeing what we know about it, let's talk a bit about the structure of our galaxy: it will help us understand better why this discovery is so peculiar.

The Milky Way Galaxy’s structure is fairly typical of a large spiral system. This structure can be viewed as consisting of six separate parts: (1) a nucleus, (2) a central bulge, (3) a disk (both a thin and a thick disk), (4) spiral arms, (5) a spherical component, and (6) a massive halo. Some of these components blend into each other.

 

At the very centre of the Galaxy lies a remarkable object—a massive black hole surrounded by an accretion disk of high-temperature gas.

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