El kilogramo, el mol, el kelvin y el ampere fueron redefinidos por constantes físicas.
SUSCRÍBETE para ver todos nuestros videos:
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¿Será este el último video que hago sobre las unidades del Sistema Internacional?
Muy posiblemente. Hay algo acerca de ser tan precisos y definir los sistemas dentro de los cuales funciona la ciencia, que me atrae mucho. Cuando podemos medir de forma más precisa y rutinaria un kilogramo, un mol, un kelvin y un ampere, entonces podemos hacer mejores observaciones, podemos detectar mejor las anomalías y mejorar nuestras teorías. Por eso es tan importante para mí. Así que aquí les presentamos la nueva definición del kilogramo.

Un agradecimiento especial a NIST: http://nist.gov

Gráficos adicionales por Ignat Berbeci

Música de http://epidemicsound.com "Experimental1"



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Traductora: Paula Salomone
Voz de doblaje: Pato Lago, Diego Rivas,
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Edición y post-producción de video: Juan Caille Tornquist
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Pequeños robots activados por campos magnéticos podrán usarse en futuros procedimientos biomédicos.
SUSCRÍBETE ahora para ver todos nuestros videos: http://bit.ly/Suscribirse_Veritasium_en_español

Muchas gracias a:
Dr. Eric Diller, Profesor Asistente de Ingeniería Mecánica en la Universidad de Toronto
http://microrobotics.mie.utoronto.ca

Investigaciones referidas en este video:

T. Xu, J. Zhang, M. Salehizadeh, O. Onaizah y E. Diller, robots flexibles a escala milimétrica con magnetización tridimensional programable y movimientos. Science Robotics 4, eaav4494 (2019).
https://robotics.sciencemag.or....g/content/4/29/eaav4

H. Xie, M. Sun, X. Fan, Z. Lin, W. Chen, L. Wang, L. Dong y Q. He, Enjambre de microrobots magnéticos reconfigurables: transformación multimodo, locomoción y manipulación. Science Robotics 4, eaav8006 (2019).
https://robotics.sciencemag.or....g/content/4/28/eaav8

G. Hwang, A. J. Paula, E. E. Hunter, Y. Liu, A. Babeer, B. Karabucak, K Stebe, V. Kumar, E. Steager y H. Koo, robots catalíticos antimicrobianos para la erradicación del biofilm. Science Robotics 4, eeaw2388 (2019).
https://robotics.sciencemag.or....g/content/4/29/eaaw2

Música de Kevin MacLeod http://incompetech.com "Marty Gots a Plan" "March of the Spoons"
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El eclipse total de sol que tuve la oportunidad de presenciar en Madras, Oregón, ocurrió el 21 de agosto del 2017 y la experiencia fue maravillosa.
Cuando la luna pasó frente al sol, el día se transformó en noche y reveló la corona solar, deslumbrándonos a todos los presentes.

Hay quienes dicen que no debes fotografiar tu primer eclipse solar y quizás tengan razón. Estaba concentrado en obtener la exposición adecuada para poder ver las perlas de Baily y el anillo de diamantes, además de asegurarme de capturar la corona y las llamaradas solares. Esto fue un poco estresante pero estoy encantado con los resultados.

El último eclipse solar total fue el 2 de julio de 2019. Se pudo ver totalmente en ciertas regiones de Argentina y Chile. En el resto de Sudamérica se vio parcialmente.

Quiero agradecer especialmente al Dr. Teagan Wall por compartir esta experiencia conmigo y a Raquel Nuno por inspirarme a venir a Oregón.

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#eclipsesolar

Cuando se comprime el aire rápidamente, puede alcanzar temperaturas altas. En esta demostración, enseñamos como el algodón puede llegar al punto de auto-ignición por una compresión rápida de aire en la jeringa de fuego.

Veritasio es el canal de doblaje de Veritasium al español. ¡Suscríbete!

Dirección y edición- Enrique Morán
Traducción- Diego Magaña

Doblaje por:
Diego Magaña - Derek Muller
Enrique Morán- Nigel

Veritasium fue fundado por Derek Muller- https://www.youtube.com/channe....l/UCHnyfMqiRRG1u-2Ms

Este es el primer video de ciencias de Veritasio. Este video trata sobre uno de los conceptos más fundamentales en la ciencia: la idea que todas las cosas están hechas de átomos, pequeñas partículas que están en movimiento perpetuo. Se atraen unos a otros cuando los separa una pequeña distancia y se repelen cuando se estrujan.

Este video es una traducción del video "Atomic Theory" de Veritasium- https://www.youtube.com/watch?v=U2g1H...

Veritasio es el canal de doblaje de Veritasium al español. ¡Suscríbete!

Dirección y edición- Enrique Morán
Traducción- Diego Magaña

Doblaje por:
Enrique Morán - Derek Muller

Veritasium fue fundado por Derek Muller - https://www.youtube.com/user/1veritasium

Video anterior- "Jeringa de Fuego" - https://www.youtube.com/watch?v=2PSd1...

¡Utilizar la mochila cohete fue una diversión increíble!
SUSCRÍBETE ahora para ver todos nuestros videos:
http://bit.ly/Suscribirse_Veritasium_en_español

A pesar de terminar con el labio hinchado la pasé de maravilla. Creo que saber algo sobre física en realidad ayuda a volar la mochila cohete. Funciona según el mismo principio que un cohete (la tercera ley de Newton), pero a diferencia del transbordador, no llevas tu propio propulsor contigo. En cambio, una moto de agua bombea agua desde el lago hasta 60 litros por segundo. Luego se dispara a través de las boquillas a aproximadamente 15 metros por segundo, creando 1800 Newton de fuerza, el equivalente a unos 150 extintores de incendios. Esto puede producir una aceleración de alrededor de 1,5 Gs sobre mí.

Música:
Kevin McLeod (http://incompetech.com) Silly Fun,
Also Sprach Zarathustra

Apoyados por Science Alert: http://on.fb.me/14ehuxA

Filmación en cámara lenta por Questacon: http://bit.ly/ZoWFGR

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Traductora: Paula Salomone
Voz de doblaje: Pato Lago
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Pusimos a prueba el aerogel contra un "No lanzallamas". Para eso expusimos frente a una enorme llama de 2000 °C, una gran manta de fibra de vidrio infundida con aerogel. SUSCRÍBETE ahora para ver todos nuestros videos: http://bit.ly/Suscribirse_Veritasium_en_español

Agradecimientos especiales a:
Aerogel Technologies: https://ve42.co/aerogeltech
Aspen Aerogels: https://ve42.co/aspen
Ben: @ BenScho999999
Dr. Stephen Steiner y el equipo de Aerogel Technologies.

El aerogel de sílice, supo ser anteriormente el sólido más liviano. Ese título ahora lo posee el aerogel de grafeno.
El material de archivo de materiales de aerogel en ambientes fríos fue proporcionado por cortesía de Aspen Aerogels. Se demostró que su producto, el crioaerogel, era flexible en nitrógeno líquido al mismo tiempo que evitaba las quemaduras frías en la mano. Son el fabricante de la manta utilizada en la parte principal de este video.

Este es el final de la serie de tres partes sobre aerogel. Pondré enlaces a las otras partes a continuación:
El Sólido Más Liviano del Mundo - AEROGEL: https://youtu.be/ArF5H_Ci3Uw
Me volví Impermeable utilizando AEROGEL: https://youtu.be/xpkvtAZV9CM

Este es un video educativo que muestra experimentos científicos realizados por profesionales. No debe ser intentado por los espectadores.

Música de Epidemic Sound: http://epidemicsound.com "Running Against the Clock" "Dangerous Forest"
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Servicios de doblaje: Unilingo
Traductora: Paula Salomone
Voz de doblaje: Pato Lago, Diego Rivas,
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Hola amantes de la ciencia, aquí les presentamos los mejores momentos de Veritasium en Español del 2019. SUSCRÍBETE para ver todos nuestros videos: http://bit.ly/Suscribirse_Veritasium_en_español

Puesto 10
0:06 Lanzallamas vs Aerogel https://youtu.be/uPWjFWruFkQ

Puesto 9
1:06 3 Efectos Desconcertantes de la Física https://youtu.be/duPJ3Ha0OFs

Puesto 8
2:01 Me volví Impermeable utilizando AEROGEL https://youtu.be/xpkvtAZV9CM

Puesto 7
3:05 ¿Podemos Nadar en Bolas de Sombra? https://youtu.be/6FjUXWL2424

Puesto 6
4:01 Tablero de Fuego - ¡Llamas Danzantes! https://youtu.be/Jq8T4IW1q4g

Puesto 5
4:49 Cómo Retrasar el Envejecimiento o incluso Revertirlo https://youtu.be/j7bYLCzmCwk

Puesto 4
5:34 Un Recubrimiento que vuelve todo Indestructible https://youtu.be/yVjGX5lkZP0

Puesto 3
6:44 Exploración en MARTE InSight - Próxima Misión MARS 2020

Puesto 2
8:02 Micro Robots Magnéticos https://youtu.be/7u7zkAeQhjE

Puesto 1
9:11 ¡Fuego en Gravedad Cero! https://youtu.be/grlAf67JjIo

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Voz de doblaje: Pato Lago, Diego Rivas,
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How does a transistor work? Our lives depend on this device.
Support Veritasium on Patreon: http://bit.ly/VePatreon
Subscribe to Veritasium - it's FREE! http://bit.ly/YSWpWm

When I mentioned to people that I was doing a video on transistors, they would say "as in a transistor radio?" Yes! That's exactly what I mean, but it goes so much deeper than that. After the transistor was invented in 1947 one of the first available consumer technologies it was applied to was radios, so they could be made portable and higher quality. Hence the line in 'Brown-eyed Girl' - "going down to the old mine with a transistor radio."

But more important to our lives today, the transistor made possible the microcomputer revolution, and hence the Internet, and also TVs, mobile phones, fancy washing machines, dishwashers, calculators, satellites, projectors etc. etc. A transistor is based on semiconductor material, usually silicon, which is 'doped' with impurities to carefully change its electrical properties. These n and p-type semiconductors are then put together in different configurations to achieve a desired electrical result. And in the case of the transistor, this is to make a tiny electrical switch. These switches are then connected together to perform computations, store information, and basically make everything electrical work intelligently.

Special thanks to PhD Comics for awesome animations: http://bit.ly/16ZXcVY

And thanks to Henry Reich and Vanessa Hill for reviews of earlier drafts of this video.

Music: Kevin MacLeod (incompetech.com) Decisions

A head-vaporizing laser with a perfect wavelength detecting sub-proton space-time ripples.
Huge thanks to Prof Rana Adhikari and LIGO: http://ligo.org
Here's how he felt when he learned about the first ever detection: https://youtu.be/ViMnGgn87dg

Thanks to Patreon supporters:
Nathan Hansen, Donal Botkin, Tony Fadell, Saeed Alghamdi, Zach Mueller, Ron Neal
Support Veritasium on Patreon: http://bit.ly/VePatreon

A lot of videos have covered the general overview of the discovery of gravitational waves, what they are, the history of the search, when they were found but I wanted to delve into the absurd science that made the detection possible.

When scientists want one megawatt of laser power, it's not just for fun (though I'm sure it's that too), it's because the fluctuations in the number of photons is proportional to their square root, making more powerful beams less noisy (as a fraction of their total). The smoothest mirrors were created not for aesthetic joy but because when you're trying to measure wiggles that are a fraction the width of a proton, a rough mirror surface simply won't do.

Filmed by Daniel Joseph Files

Music by Kevin MacLeod, http://www.incompetech.com "Black Vortex" (appropriately named)

Music licensed from Epidemic Sound http://epidemicsound.com "Observations 2" (also appropriately named)

Does quantum entanglement make faster-than-light communication possible?
What is NOT random? http://bit.ly/NOTrandoVe
First, I know this video is not easy to understand. Thank you for taking the time to attempt to understand it. I've been working on this for over six months over which time my understanding has improved. Quantum entanglement and spooky action at a distance are still debated by professors of quantum physics (I know because I discussed this topic with two of them).

Does hidden information (called hidden variables by physicists) exist? If it does, the experiment violating Bell inequalities indicates that hidden variables must update faster than light - they would be considered 'non-local'. On the other hand if you don't consider the spins before you make the measurement then you could simply say hidden variables don't exist and whenever you measure spins in the same direction you always get opposite results, which makes sense since angular momentum must be conserved in the universe.

Everyone agrees that quantum entanglement does not allow information to be transmitted faster that light. There is no action either detector operator could take to signal the other one - regardless of the choice of measurement direction, the measured spins are random with 50/50 probability of up/down.

Special thanks to:
Prof. Stephen Bartlett, University of Sydney: http://bit.ly/1xSosoJ
Prof. John Preskill, Caltech: http://bit.ly/1y8mJut

Looking Glass Universe: http://bit.ly/17zZH7l
Physics Girl: http://bit.ly/PhysGirl
MinutePhysics: http://bit.ly/MinPhys
Community Channel: http://bit.ly/CommChannel
Nigel, Helen, Luke, and Simon for comments on earlier drafts of this video.

Filmed in part by Scott Lewis: http://google.com/+scottlewis

Music by Amarante "One Last Time": http://bit.ly/VeAmarante

How does a transistor work? https://www.youtube.com/watch?v=IcrBqCFLHIY
Silicon-28 sphere: http://bit.ly/10J1G2o
This episode supported by audible.com: http://bit.ly/ZJ5Q6z

We have looked at how a transistor works, the fundamental unit of classical computers, and how a quantum computer works in theory, taking advantage of quantum superposition to hold exponentially more information than classical computers. Now we look at the practical side of making a quantum bit, or qubit. How do you put it in a state where it is stable? How do you read and write information on it? These processes are described for a solid state qubit - a phosphorous atom in a silicon crystal substrate. Both the electron and the nucleus of the phosphorous atom can be used as qubits.

Thanks to A/Prof. Andrea Morello: http://bit.ly/17wZ7lt

Thanks to Henry Reich (MinutePhysics) for pushing me to make the explanations and visualizations clearer.

Complete unedited interviews: http://www.youtube.com/watch?v=8dcw98B2Nzg
Trees can weigh hundreds or even thousands of tons, but where do they get this mass from? A few common answers are: the soil, water, and sunlight. But the truth is the vast majority of a dry tree's mass comes from the air - it originated as carbon dioxide

Huge thanks to the Royal Institution, Professor Frank James, and Katie Atmore for filming.
For the Sixty Symbols version of this experiment click http://bit.ly/RGfLY5

Michael Faraday created the first electric generator in 1831 using a coil of wire and a permanent magnet. When the magnet was moved relative to the coil, current was induced in the coil. A similar experiment can be performed with a copper tube and a magnet. Although copper is not magnetic, it is a conductor. As the magnet falls through the pipe, the magnetic field changes over different sections of the pipe. This induces swirling currents (called eddy currents), which create a magetic field that opposes the motion of the magnet. This means work must be done to move the magnet through the pipe. This work generates the electrical energy, which is then dissipated as thermal energy in the pipe. The same basic principle is used to generate electricity throughout the world: moving a magnet inside copper coils.

Experiments A Cappella http://bit.ly/TtdflV
Where Did The Earth Come From http://bit.ly/VQBzQJ
The Coastline Paradox http://bit.ly/TIapxM
Microwave Grape Plasma http://bit.ly/QkCwUt


Music by Kevin McLeod (http://www.incompetech.com) Sneaky Snitch and Danse Macabre

Lift is an important concept, not only in flying but also in sailing. This week I'm talking to Olympic Sailor, Hunter Lowden. But before I get to the physics of sailing I thought I would explain lift since it's generally poorly understood.

minutephysics http://bit.ly/Muh6CC
1veritasium http://bit.ly/MrupzL
efit30 http://bit.ly/O4CMme
appchat http://bit.ly/NxAMlX
erikaanear http://bit.ly/MdyUzQ
whoisjimmy http://bit.ly/LtFzpW
numberphile http://bit.ly/numberphile



Music by Nathaniel Schroeder
youtube: http://bit.ly/pakJLE
myspace: http://mysp.ac/qtmZQj

How much would it take for you to risk $10?
Check out Audible: http://bit.ly/AudibleVe
Can you solve this? http://bit.ly/248Ve
Regression to the mean: http://bit.ly/VeRTTM

Help translate Veritasium videos into other languages: http://veritasium.subtitl.us

Psychological literature shows that we are more sensitive to small losses and than small gains, with most people valuing a loss around 1.5-2.5 times as much as a gain. This means that we often turn down reasonable opportunities for fear of the loss. However over the course of our lives we will be exposed to many risks and opportunities and this invariably means that taking every small reasonable bet will leave us better off than saying no to all of them.

NOTE: The video is not saying to accept every bet, only those with reasonable odds (preferably in your favour), and those which if you lose would not cause significant financial or other damage. In those cases it is wise to be loss averse!

Filmed by Adrian Tan

Thanks to Physics Girl for suggestions on previous versions of this video. https://www.youtube.com/physicswoman

Explanations for http://youtu.be/1Xp_imnO6WE
Follow me on twitter: http://bit.ly/VeTwitter
or Instagram: http://bit.ly/VeInsta
or Facebook: http://bit.ly/FBVeritasium
For more on deflecting polar streams with electric fields, see:
http://pubs.acs.org/doi/abs/10.1021/ed077p1520


I'm in Hobart for a live show on Friday at UTAS followed by gigs in Sydney and Canberra next weekend.

This is the solution to: http://youtu.be/QD3hbVG1yxM
Watch this first!

Why does time appear to speed up as we get older? Can we slow it down?
Thanks to the National Geographic Channel for sponsoring this video!
The new season of Brain Games starts Sunday, February 14th at 9/8c - http://po.st/90S7Ow

Brain Games is an Emmy-nominated TV series that explores the inner workings of the human mind through experiments and interactive games. Did you know it's estimated that you have more than a dozen senses in addition to the standard five? One of those is a sense of time or chronoception. Tune in to the new season of Brain Games to learn about all of your senses, and more, starting Sunday, February 14 at 9/8c

References:

Ageing and duration judgement:
http://bit.ly/1TRN0cr

Nerve conduction velocity slowing with age:
http://bit.ly/23Wq6oE

Experiments with rats suggest time perception is distributed across brain:
http://bit.ly/1T6IjdO

Time perception with repeated stimuli:
http://bit.ly/1TRNbo5

Energy usage in brain with age:
http://bit.ly/1nXliOU

Time perception in moments of fear / danger:
http://bit.ly/1RoK7Ps
http://1.usa.gov/1TRNa3w
http://bit.ly/1Q8tDvW

Attention’s relation to time perception and recollection of perceived time:
http://bit.ly/20odeD8
http://bit.ly/1TRNfEf

The merging of two neutron stars was detected by gravitational waves and then by telescopes in all parts of the electromagnetic spectrum. This is a historic detection as it demonstrates:
- the first gravitational waves detected from inspiraling neutron stars
- the first joint observation by gravitational wave and electromagnetic wave astronomy
- identification of a gamma ray burst in conjunction with merging neutron stars
- how gravitational waves and gamma rays can be used together to locate their source

All evidence so far indicates that the data support General Relativity.

Special thanks to Patreon supporters:
Tony Fadell, Donal Botkin, Curational, Jeff Straathof, Zach Mueller, Ron Neal, Nathan Hansen, Corvi

Support Veritasium on Patreon: http://ve42.co/patreon

Graphics from:
Jets and Debris from a Neutron Star Collision
This animation captures phenomena observed over the course of nine days following the neutron star merger known as GW170817. They include gravitational waves (pale arcs); a near-light-speed jet that produced gamma rays (magenta); expanding debris from a "kilonova" that produced ultraviolet (violet), optical and infrared (blue-white to red) emission; and, once the jet directed toward us expanded into our view from Earth, X-rays (blue).
Credit: NASA's Goddard Space Flight Center/CI Lab

Virgo Helps Localize Gravitational-Wave Signals
Sky localizations of gravitational-wave signals detected by LIGO beginning in 2015 (GW150914, LVT151012, GW151226, GW170104), and, more recently, by the LIGO-Virgo network (GW170814, GW170817). After Virgo came online in August 2017, scientists were better able to localize the gravitational-wave signals. The background is an optical image of the Milky Way. The localizations of GW150914, LVT151012, and GW170104 wrap around the celestial sphere, so the sky map is shown with a translucent dome.
Credit: LIGO/Virgo/NASA/Leo Singer (Milky Way image: Axel Mellinger)

Variety of Gravitational Waves and a Chirp
The signal measured by LIGO and Virgo from the neutron star merger GW170817 is compared here to previously detected binary black hole mergers. All signals are shown starting at 30 Hertz, and the progression of GW170817 is shown in real time, accompanied by its conversion to audio heard at the end of the movie. GW170817 was observable for more than 30 times longer than any previous gravitational-wave signal.
Credit: LIGO/University of Oregon/Ben Farr

LIGO is funded by the NSF, and operated by Caltech and MIT, which conceived of LIGO and led the Initial and Advanced LIGO projects. Financial support for the Advanced LIGO project was led by the NSF with Germany (Max Planck Society), the U.K. (Science and Technology Facilities Council) and Australia (Australian Research Council) making significant commitments and contributions to the project.

More than 1,200 scientists and some 100 institutions from around the world participate in the effort through the LIGO Scientific Collaboration, which includes the GEO Collaboration and the Australian collaboration OzGrav. Additional partners are listed at http://ligo.org/partners.php

The Virgo collaboration consists of more than 280 physicists and engineers belonging to 20 different European research groups: six from Centre National de la Recherche Scientifique (CNRS) in France; eight from the Istituto Nazionale di Fisica Nucleare (INFN) in Italy; two in the Netherlands with Nikhef; the MTA Wigner RCP in Hungary; the POLGRAW group in Poland; Spain with the University of Valencia; and the European Gravitational Observatory, EGO, the laboratory hosting the Virgo detector near Pisa in Italy, funded by CNRS, INFN, and Nikhef.