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17 Apr 2024 16:52:38 UTC
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How bikes actually stay upright
Why are bicycles stable? The most common answer is gyroscopic effects, but this is not right.
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https://www.youtube.com/watch?v=scliyWrN7mk
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https://www.youtube.com/watch?v=scliyWrN7mk
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English
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VIDEO
SUPER
supersized-slow-mo-slinky-drop
What happens when a super long slinky is dropped?
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1 year ago
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VIDEO
THE B
the-best-and-worst-prediction-in-science
The best and worst predictions in science are both based on the same underlying physics
Check out the Great Courses Plus: http://ow.ly/cePe303oKDM
Support Veritasium on Patreon: http://bit.ly/VePatreon
Special thanks to:
Prof. Sean Carroll
Prof. Brian Schmidt
Prof. Stephen Bartlett
Prof. Geraint Lewis
...
https://www.youtube.com/watch?v=g20JZ2HNZaw
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1 year ago
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VIDEO
POST-
post-truth-why-facts-don-t-matter
Why we can't seem to agree on what's true when it's easier than ever to check.
Videos like this are usually on 2Veritasium: http://bit.ly/2Veritasium
Support Veritasium on Patreon: http://bit.ly/VePatreon
This video was filmed at a meetup in Stockholm, Sweden on Dec. 9, 2016. Huge thanks to everyone who attended - I had a great time. Sorry to those of you I missed, especially Lund and Gothenburg.
Thanks to Patreon supporters (but this is a non-paid post):
Meshal Alshammari, Nathan Hansen, Bryan Baker, Donal Botkin, Tony Fadell, Saeed Alghamdi, Ron Neal
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VIDEO
THE I
the-inverse-leidenfrost-effect
Droplets levitate on a bath of liquid nitrogen and are spontaneously self-propelled. Thanks Audible! Start a 30-day trial and your first audiobook is free. Go to https://audible.com/VERITASIUM or text VERITASIUM to 500500.
Special thanks to Dr. Anaïs Gauthier
Physics of Fluids: https://pof.tnw.utwente.nl/
Self-propulsion of inverse Leidenfrost drops on a cryogenic bath
Anaïs Gauthier, Christian Diddens, Rémi Proville, Detlef Lohse, and Devaraj van der Meer
PNAS January 22, 2019 116 (4) 1174-1179; published ahead of print January 22, 2019
https://www.pnas.org/content/116/4/1174
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https://www.youtube.com/watch?v=M2CMH57hXmY
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1 year ago
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VIDEO
WHY W
why-women-are-stripey
Epigenetics means women have different active x-chromosomes in different cells. Animation courtesy of http://wehi.tv
Music by Amarante: http://bit.ly/VeAmarante
Animation: Etsuko Uno
Art and Technical Direction: Drew Berry
Sound Design: Francois Tetaz & Emma Bortignon
Scientific Consultation: Marnie Blewitt
Courtesy of Walter and Eliza Hall Institute of Medical Research: http://wehi.tv
When a female embryo is four days old it consists of just 100 cells. At this point the x-chromosome from Mom and the one from Dad are both active. But in order for proper development to occur, one of the x chromosomes must be switched off.
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https://www.youtube.com/watch?v=BD6h-wDj7bw
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1 year ago
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VIDEO
FIRST
first-image-of-a-black-hole
The Event Horizon Telescope Collaboration observed the supermassive black hole at the center of M87, finding the dark central shadow in accordance with General Relativity, further demonstrating the power of this 100 year-old theory.
To understand more about why the shadows look the way they do, check out: https://www.youtube.com/watch?v=zUyH3XhpLTo
I will continue updating this description with more links.
Event Horizon Telescope collaboration: https://ve42.co/EHT
Animations and simulations with English text:
L. R. Weih & L. Rezzolla (Goethe University Frankfurt)
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https://www.youtube.com/watch?v=S_GVbuddri8
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VIDEO
HEISE
heisenberg-s-uncertainty-principle
Heisenberg's uncertainty principle tells us that it is impossible to simultaneously measure the position and momentum of a particle with infinite precision. In our everyday lives we virtually never come up against this limit, hence why it seems peculiar. In this experiment a laser is shone through a narrow slit onto a screen. As the slit is made narrower, the spot on the screen also becomes narrower. But at a certain point, the spot starts becoming wider. This is because the photons of light have been so localised at the slit that their horizontal momentum must become less well defined in order to satisfy Heisenberg's uncertainty principle.
I based this video on one by Prof. Walter Lewin of MIT: http://bit.ly/100Wk2K
Henry (MinutePhysics) has previously made a video about Heisenberg's Uncertainty Principle where he treats it as less spooky and more a consequence of waves: http://bit.ly/TV3xO5
Sixty Symbols has a great video on Planck's constant: http://bit.ly/11upebY
Thanks to the University of Sydney for hosting this experiment, especially to Tom and Ralph for their assistance getting it working.
...
https://www.youtube.com/watch?v=a8FTr2qMutA
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Controlling
VIDEO
SCIEN
scientific-notation-explained
Scientists have to work with some very large and some very small numbers. To represent these numbers more easily, they use scientific notation. Scientific notation relies on powers of 10. This video gives examples of how to represent a large and small number and explains powers of ten.
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1 year ago
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Controlling
VIDEO
ASTER
asteroids-earth-s-biggest-threat
Steven Hawking thought an asteroid impact posed the greatest threat to life on Earth. Thanks to Kiwico for sponsoring this video. For 50% off your first month of any crate, go to https://kiwico.com/veritasium50
For other potential world ending catastrophes, check out Domain of Science: https://ve42.co/DoS
Special thanks to:
Prof. Dave Jewitt from UCLA Astronomy
Scott Manley: https://www.youtube.com/user/szyzyg
Ryan Wyatt at Morrison Planetarium
Prof. Amy Mainzer
Alexandr Ivanov for opening shot of Chelyabinsk Meteor
Maps of Asteroid Impacts —https://ve42.co/Map
Opposition Effect — https://ve42.co/Belskaya2000
Belskaya, I. N., & Shevchenko, V. G. (2000). Opposition effect of asteroids. Icarus, 147(1), 94-105.
Potentially Hazardous Asteroids — https://ve42.co/Perna2013
Perna, D., Barucci, M. A., & Fulchignoni, M. (2013). The near-Earth objects and their potential threat to our planet. The Astronomy and Astrophysics Review, 21(1), 65.
Survey of Potentially Hazardous Asteroids — https://ve42.co/NEOSurvey
Population Vulnerability — https://ve42.co/Rumpf2017
Rumpf, C. M., Lewis, H. G., & Atkinson, P. M. (2017). Population vulnerability models for asteroid impact risk assessment. Meteoritics & Planetary Science, 52(6), 1082-1102.
Size distribution of NEOs — https://ve42.co/Trilling17
Trilling, D. E., Valdes, F., Allen, L., James, D., Fuentes, C., Herrera, D., ... & Rajagopal, J. (2017). The size distribution of near-earth objects larger than 10 m. The Astronomical Journal, 154(4), 170.
2020 NEOWISE Data Release — https://ve42.co/NEOWISE
National Research Council Report— https://ve42.co/Defending
Board, S. S., & National Research Council. (2010). Defending planet earth: Near-Earth-Object surveys and hazard mitigation strategies. National Academies Press.
Tug Boat — https://ve42.co/Schweickart03
Schweickart, R. L., Lu, E. T., Hut, P., & Chapman, C. R. (2003). The asteroid tugboat. Scientific American, 289(5), 54-61.
Gravity Tractor 1 — https://ve42.co/Lu05
Lu, E. T., & Love, S. G. (2005). Gravitational tractor for towing asteroids. Nature, 438(7065), 177-178.
Laser Ablation — https://ve42.co/Thiry14
Thiry, N., & Vasile, M. (2014). Recent advances in laser ablation modelling for asteroid deflection methods. SPIE Optical Engineering+ Applications, 922608-922608.
Yarakovsky Effect — https://ve42.co/Yara
DART Mission — https://ve42.co/DART
Nuclear 1 — https://ve42.co/Ahrens92
Ahrens, T. J., & Harris, A. W. (1992). Deflection and fragmentation of near-Earth asteroids. Nature, 360(6403), 429-433.
Nuclear 2 — https://ve42.co/Bradley10
Bradley, P. A., Plesko, C. S., Clement, R. R., Conlon, L. M., Weaver, R. P., Guzik, J. A., ... & Huebner, W. F. (2010, January). Challenges of deflecting an asteroid or comet nucleus with a
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https://www.youtube.com/watch?v=4Wrc4fHSCpw
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Created
1 year ago
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video/mp4
English