Top Vídeos

Making SOLID Nitrogen!

Veritasium
6 vistas · 7 años hace

What happens when you decrease the pressure around a liquid? It boils. Water boils at room temperature once the pressure is low enough. What is interesting is that this decreases the temperature of the liquid. The fastest molecules escape, leaving the slower ones behind.
Using this trick with liquid nitrogen, it is possible to create solid nitrogen at a temperature of -210C. We then poured the solid and liquid nitrogen mixture onto a tray of water. The surface of the water became so cold that CO2 solidified out of the atmosphere on its surface. Then, since CO2 does not pass through the liquid phase at atmospheric pressure, it was propelled on the water surface by jets of gas as it sublimed.
Huge thanks to the Palais de la Decouverte.
Music by Kevin MacLeod of Incompetech.com (Mirage)

Is There Gravity In Space?

Veritasium
6 vistas · 7 años hace

If you've seen footage from the International Space Station or any of the space shuttle missions, you know that astronauts float around as they orbit the Earth. Why is that? Is it because the gravitational force on them is zero in space? (Or nearly zero?) The truth is that the strength of the gravitational attraction is only slightly less than it is on Earth's surface. So how are they able to float? Well, they aren't floating - they're falling, along with the space station. They don't crash into the Earth because they have a huge orbital velocity. So as they accelerate towards the Earth, the Earth curves away beneath them and they never get any closer. Since the astronauts have the same acceleration as the space station, they feel weightless. It's like being in a free-falling elevator (without the disastrous landing).

Director of Photography: Stefan Smith
Camera Assistant: Raa Perajeev
Boom Operator: Maha Sivalingam

Production Coordinator: Adrian Tan
Production Assistants: James Peniata, Pratheep Ramachandran

¿Qué es el Sesgo de Confirmación?

Veritasium
6 vistas · 6 años hace

¿Puedes averiguar cuál es la regla?
¿Cómo investigas las hipótesis?
¿Tratas de confirmar tu teoría, buscando cisnes blancos?

Me sorprendió lo difícil que era para las personas averiguar conjuntos de números que no seguían sus hipótesis, incluso cuando su método no los estaba llevando a ninguna parte.
El "Sesgo de Confirmación" es esta tendencia a favorecer y buscar la información que nos reasegura y reconfirma en nuestras desiciones, descartando la evidencia en contra, dándonos menos posibilidad de considerar otras alternativas.

En el video digo “cuando se descubrió Australia ..." a lo que me refiero es, "cuando los europeos que creían que todos los cisnes eran blancos vinieron a Australia …”. No quise ofender a los pueblos originarios que ya estaban en Australia en ese momento. Por favor, acepten mis disculpas por esta frase si alguien se ofendió por ello.

Este video fue inspirado en el libro El Cisne Negro de Nassim Taleb y fue grabado por mi madre. ¡Gracias mamá!

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Servicios de doblaje: Unilingo
Traductora: Paula Salomone
Voz de doblaje: Pato Lago, Diego Rivas
Ingeniero de sonido: Gastón Adriel Álvarez
Edición y post-producción de video: Yoel Aaron Echegaray Salas, Juan Caille Tornquist
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#veritasiumenespañol

¿De Qué Está Hecha la Llama de una Vela?

Veritasium
6 vistas · 6 años hace

¿Es realmente la llama un plasma? Bien, depende de la definición de plasma, pero de seguro hay iones en una llama. Estos iones se forman cuando las moléculas chocan entre sí a alta velocidad, a veces liberando los electrones de sus átomos.

Quisiera darle un agradecimiento especial al Palais de la Decouverte por ayudarme a realizar este experimento.
Usando decenas de miles de voltios en dos placas de metal, creamos un campo eléctrico muy fuerte alrededor de la llama. Esto atrajo iones positivos en una dirección e iones negativos en la otra dirección alargando la llama horizontalmente y haciendo que parpadee como una “mariposa”. Luego mostramos que a través de la llama se pueden producir chispas mucho más largas, que a través del aire, ya que los iones aumentan la conductividad.

Why Is Ice Slippery?

Veritasium
6 vistas · 7 años hace

In Sydney, ice melts because it is warm out in the middle of the day (even in winter). This creates a layer of water on top that certainly makes it slippery. But should it be slippery at night or in a cold northern climate where the air temperature is below zero? Yes, because the pressure your skates apply to the ice actually lowers its melting point allowing you to glide along a thin layer of water.

Animation in this video is courtesy of VisChem (TM), Copyright 1995, Roy Tasker

For a more complete picture of the mechanisms involved in making ice slippery, check out this great article: http://lptms.u-psud.fr/membres..../trizac/Ens/L3FIP/Ic

La Ciencia detrás de la Depilación Láser en Camara Lenta

Veritasium
6 vistas · 6 años hace

Hoy descubriremos la ciencia involucrada en el proceso de depilación con laser.
SUSCRÍBETE ahora para ver todos nuestros videos: http://bit.ly/Suscribirse_Veritasium_en_español

El láser que se usa tiene una longitud de onda de 1064 nanómetros es decir que es radiación infrarroja, invisible para nuestros ojo.
Los ojos oscuros, la piel y el cabello contienen una molécula llamada melanina que absorbe una amplia gama de longitudes de onda de luz, especialmente en la parte ultravioleta del espectro, y crea un escudo ideal contra los rayos dañinos del sol. Es por esto que te bronceas cuando tomas sol.
Ese es tu cuerpo que produce y libera más melanina en la piel.
Pero la idea con la depilación láser es hacer que los cabellos oscuros absorban la luz laser sin que la piel alrededor absorba mucha energía.
Entonces, funciona mejor si tienes cabellos oscuros y piel clara.

Un agradecimiento especial a Laser Away en Santa Mónica por ayudar a que esto suceda, ¡Su staff fue increíble! http://bit.ly/VeLaserAway

Además, quiero agradecer a Darren, sin BeyondSlowMotion nunca podríamos haber hecho esto. http://bit.ly/VeBeyondSlowMo

Investigación y filmación de Raquel Nuno y Aaron White.
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Servicios de doblaje: Unilingo
Traductora: Paula Salomone
Voz de doblaje: Pato Lago, Diego Rivas, Julia Gonzalez Biondini
Ingeniero de sonido: Gastón Adriel Álvarez
Edición y post-producción de video: Juan Caille Tornquist
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#veritasiumenespañol

How to Paint a Starry Night in the Woods - Stars - Very Easy

user37
6 vistas · 7 años hace

My drawing book: http://amzn.to/1K7L8Ed
Visit me on FB: https://www.facebook.com/LeonardoPereznieto
My website: http://www.ArtistLeonardo.com/
O Art Int: http://oartinternational.com/

Do you want to help me translating it into your language?
(Note: First check if it hasn´t been translated already by pressing the "CC" button on the lower part of the video).
All you need to do is to please go to the following link and translate. Thank you!:
http://www.youtube.com/timedtext_video?ref=share&v=o1y3kf7JD9k

If you would like to invest in a drawing, painting or sculpture by Leonardo Pereznieto, or to hire him for workshops or lectures, please write to: info@artistleonardo.com (Business only, not for personal messages.)

List of materials:

Branches
Acrylic white, blue and black paints
Brushes round 6 and round 2
Black cardboard paper

If you would like to see photos and brands of my tools, please go to my blog about materials with the following link:

http://fineart-tips.blogspot.m....x/2015/07/my-drawing

Download Fine Art-Tips mobile app:

On the Apple Store:

For iPhone/iPad free: https://itunes.apple.com/us/ap....p/fine-art-tips-draw

For iPhone/iPad, Premium: https://itunes.apple.com/us/ap....p/fine-art-tips-prem

On Google Play:

For Android free: https://play.google.com/store/apps/details?id=allmax.fine.art.tips.free2&hl=en

For Android, Premium: https://play.google.com/store/apps/details?id=allmax.fine.art.tips2&hl=en

You may also follow me on:

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My VK: http://vk.com/leonardopereznieto

My website Leonardo Pereznieto: http://www.leonardopereznieto.com/leo/Intro.html

I wish you great creations!

Audio file(s) provided by http://www.audiomicro.com

This tutorial shows How to Paint a Starry Night in the Woods - Stars - Very Easy

How to Paint a Sunset in Watercolor - Landscape at dusk - By ArtistLeonardo

user37
6 vistas · 7 años hace

To get this artwork, click here: http://www.artpal.com/artistleonardo?i=37974-3
Visit me on FB: https://www.facebook.com/LeonardoPereznieto
Follow Fine Art Tips on Google+: http://goo.gl/TqsmiJ
My website: http://www.ArtistLeonardo.com/

Do you want to help me translating it into your language?
(Note: First check if it hasn´t been translated already by pressing the "CC" button on the lower part of the video).
All you need to do is to please go to the following link and translate. Thank you!:
http://www.youtube.com/timedte....xt_video?v=3I4MIhNZK

If you would like to invest in a drawing, painting or sculpture by Leonardo Pereznieto, or to hire him for workshops or lectures, please write to: info@artistleonardo.com (Business only, not for personal messages.)

List of materials:

Mechanical pencil with 0.7mm, B lead
Schmincke Watercolor set
MagicRub FaberCastell eraser
Fabriano watercolor paper 240 gm, rough, 25% cotton

If you would like to see photos and brands of my tools, please go to my blog about materials with the following link:

http://www.fineartebooks.com/h....owtodraw_drawingscho

You may also follow me on:

My Blog: http://www.fineartebooks.com/h....owtodraw_drawingscho

My Twitter: https://twitter.com/#!/ArtistLeonardo

Fine Art Tips on Google+: http://goo.gl/TqsmiJ

My Google+ page as an artist (with my sculptures, paintings, etc): http://goo.gl/n7p96D

My Instagram: http://instagram.com/artistleonardo

My LinkedIn: http://www.linkedin.com/profile/view?id=89957576&trk=tab_pro

My Vine: https://vine.co/v/hKnn3rbwJmT

My Pinterest: http://pinterest.com/ArtistLeonardo/

My VK: http://vk.com/leonardopereznieto

My website Leonardo Pereznieto: http://www.leonardopereznieto.com/leo/Intro.html

I wish you great creations!

Audio file(s) provided by http://www.audiomicro.com

This tutorial shows How to Draw a Sunset in Watercolor - Landscape at dusk

How to Draw Koi Fish With Color Pencils - Как нарисовать рыбку Кои цветными карандашами

user37
6 vistas · 7 años hace

Visit me on FB: https://www.facebook.com/LeonardoPereznieto
Follow Fine Art Tips on Google+: http://goo.gl/TqsmiJ
My website: http://www.artistleonardo.com/

Do you want to help me translating it into your language?
(Note: First check if it hasn´t been translated already by pressing the "CC" button on the lower part of the video).
All you need to do is to please translate the file at the link below and send it to me:
https://drive.google.com/file/....d/0B0UOw8r7hWG2T2R2c

Visit: http://www.fineartebooks.com/ for free drawing tutorials.

If you would like to invest in a drawing, painting or sculpture by Leonardo Pereznieto, or to hire him for workshops or lectures, please write to: info@leopereznieto.com (Business only, not for personal messages.)

List of materials:

Mechanical pencil with 0.7mm, B lead
Color pencils: Faber-Castell Polychromos
White pastel: Primo Bianco
Kneaded eraser Prismacolor
Light blue cardboard paper

If you would like to see photos and brands of my tools, please go to my blog about materials with the following link:

http://www.fineartebooks.com/howtodraw_drawingschool/My_Blog/Entries/2012/8/1_My_materials.html

You may also follow me on:

My Blog: http://www.fineartebooks.com/howtodraw_drawingschool/My_Blog/My_Blog.html

My Twitter: https://twitter.com/#!/ArtistLeonardo

Fine Art Tips on Google+: http://goo.gl/TqsmiJ

My Google+ page as an artist (with my sculptures, paintings, etc): http://goo.gl/n7p96D

My Instagram: http://instagram.com/artistleonardo

My LinkedIn: http://www.linkedin.com/profile/view?id=89957576&trk=tab_pro

My Vine: https://vine.co/v/hKnn3rbwJmT

My Pinterest: http://pinterest.com/ArtistLeonardo/

My VK: http://vk.com/leonardopereznieto

My website Leonardo Pereznieto: http://www.leonardopereznieto.com/leo/Intro.html

I wish you great creations!

Audio file(s) provided by http://www.audiomicro.com

This tutorial shows How to Draw Koi Fish With Color Pencils
Как нарисовать рыбку Кои цветными карандашами