What's the tallest THING we've ever built? How tall will we EVER be able to build?
Other VSauce videos
Monday, 31 December 2012
Pressure Fields and Fluid Acceleration
National Committee for Fluid Mechanics Films
Ascher H. Shapiro, MIT
Other videos from this series
Film notes
Ascher H. Shapiro, MIT
Other videos from this series
Film notes
Sunday, 30 December 2012
Hewitt-Drew-it! 28. Work and Potential Energy
Paul illustrates work and potential energy via a barbell and other vertical lifts, and the energy states of a simple pendulum.
Other Hewitt-Drew-it! videos
Other Hewitt-Drew-it! videos
Julius Sumner Miller - Soap Bubbles
Physics demonstrations by Julius Sumner Miller- soap bubbles and soap films (and some mercury droplets).
Other physics demonstrations by Julius Sumner Miller
Other physics demonstrations by Julius Sumner Miller
Saturday, 29 December 2012
Supernova Shock Waves—Powerhouses of the Galaxy
Yasunobu Uchiyama, a scientist with the Kavli Institute for Particle Astrophysics and Cosmology at SLAC, delivered the Nov. 27 SLAC Public Lecture, "Supernova Shock Waves: Powerhouses of the Galaxy."
Uchiyama's talk highlights the powerful remnants of exploding stars, called supernovae, which are among the universe's most spectacular pyrotechnics displays.
For thousands of years after a supernova explosion, massive orbs of high-energy particles with strong magnetic fields remain confined by the expanding shock wave. These remnants "are among the most beautiful and mysterious objects in the cosmos," notes Uchiyama, a member of the Fermi Gamma-ray Space Telescope Large Area Telescope collaboration who has expertise in supernova remnants.
The Fermi space telescope allows researchers to study supernova remnants in many wavelengths, from visible light to radio waves, X-rays and gamma rays. Uchiyama describes Fermi telescope observations that reveal how supernova remnants act as giant particle accelerators, spewing high-energy cosmic rays. Lecturer: Yasunobu Uchiyama, SLAC
Uchiyama's talk highlights the powerful remnants of exploding stars, called supernovae, which are among the universe's most spectacular pyrotechnics displays.
For thousands of years after a supernova explosion, massive orbs of high-energy particles with strong magnetic fields remain confined by the expanding shock wave. These remnants "are among the most beautiful and mysterious objects in the cosmos," notes Uchiyama, a member of the Fermi Gamma-ray Space Telescope Large Area Telescope collaboration who has expertise in supernova remnants.
The Fermi space telescope allows researchers to study supernova remnants in many wavelengths, from visible light to radio waves, X-rays and gamma rays. Uchiyama describes Fermi telescope observations that reveal how supernova remnants act as giant particle accelerators, spewing high-energy cosmic rays. Lecturer: Yasunobu Uchiyama, SLAC
Friday, 28 December 2012
Wobbly Earth - Sixty Symbols
Axial precession is the reason the Earth's axis has a long-term but quite dramatic "wobble", as explained here by Roger Bowley and Mike Merrifield.
Other Sixty Symbols videos
Other Sixty Symbols videos
Hewitt-Drew-it! 27. Freddy-Frog Momentum Problem
Paul explains two ways that Freddy the Frog slows a horizontally-moving skateboard by vertically falling on it.
Other Hewitt-Drew-it! videos
Other Hewitt-Drew-it! videos
Dark Matter
Physicists estimate that dark matter accounts for about twenty three percent of the known universe - the only problem is that no one really knows what it is...
Other Sci-Show videos
Other Sci-Show videos
Thursday, 27 December 2012
Measuring the Universe
The vast size of the universe requires special units when measuring distances.
This video explains the Astronomical Unit, the Light-year and the parsec.
Inverted Pendulum
A physical pendulum finds stability in its inverted position when driven at the proper frequency and amplitude combination.
The physical pendulum seen here is mounted on a ball-bearing pivot and can rotate 360 degrees; the pivot is driven at about 50 Hz with an amplitude of about 1 cm (3/4" per stroke) by a Sears Craftsman Auto Scroller Saw (model 315.172090); the length is 45 cm and the center of mass is slightly above 15 cm from the pivot; the rotational inertia is roughly 4x10^(-4) kg*m^2; the mass is about 100 grams.
For more details and references for further study see: http://sciencedemonstrations.fas.harvard.edu/icb/icb.do?keyword=k16940&pa...
Shot in 24 and 300 fps. Thanks to Rob, Fu, and Daniel for their help.
The physical pendulum seen here is mounted on a ball-bearing pivot and can rotate 360 degrees; the pivot is driven at about 50 Hz with an amplitude of about 1 cm (3/4" per stroke) by a Sears Craftsman Auto Scroller Saw (model 315.172090); the length is 45 cm and the center of mass is slightly above 15 cm from the pivot; the rotational inertia is roughly 4x10^(-4) kg*m^2; the mass is about 100 grams.
For more details and references for further study see: http://sciencedemonstrations.fas.harvard.edu/icb/icb.do?keyword=k16940&pa...
Shot in 24 and 300 fps. Thanks to Rob, Fu, and Daniel for their help.
Wednesday, 26 December 2012
X-ray Laser Captures Atoms and Molecules in Action
The Linac Coherent Light Source at SLAC is the world's most powerful X-ray laser. Just two years after turning on in 2009, breakthrough science is emerging from the LCLS at a rapid pace. A recent experiment used the X-rays to create and probe a 2-million-degree piece of matter in a controlled way for the first time—a significant leap toward understanding the extreme conditions found in the hearts of stars and giant planets, and a finding which could further guide research into nuclear fusion, the mechanism that powers the sun. Upcoming experiments will investigate the fundamental, atomic-scale processes behind such phenomena as superconductivity and magnetism, as well as peering into the molecular workings of photosynthesis in plants.
Filmed and produced by SLAC Multimedia Communications; Music ("The Dig") courtesy Dwight Chalmers @ The Listen Laboratory. Copyright 2012 SLAC National Accelerator Laboratory.
Filmed and produced by SLAC Multimedia Communications; Music ("The Dig") courtesy Dwight Chalmers @ The Listen Laboratory. Copyright 2012 SLAC National Accelerator Laboratory.
Tuesday, 25 December 2012
ScienceCasts: Christmas Sky Show
The Moon and Jupiter are converging for a heavenly sky show on Christmas 2012. Got a telescope? Something extra-special is happening on Jupiter that makes it an appealing target for backyard optics.
ReMakingHistory: Magdeburg Hemisphere
MAKE magazine Contributing Editor William Gurstelle recreates the vacuum forming experiment performed by Otto von Guericke in the 17th Century. You can do it, too.
Monday, 24 December 2012
The Physics Of Santa
Breaking down the physics behind Santa and whether he can really deliver all of those presents on Christmas Eve.
Wednesday, 19 December 2012
Jocelyn Bell Burnell: is the world going to end in 2012?
Professor Dame Jocelyn Bell Burnell is a visiting Astrophysics professor at the University of Oxford and now guest lectures on whether the world is going to end.
This is in response to the Mayan calendar ending on 21 December 2012.
She is famous for discovering the first radio pulsars and is one of the great minds in physics.
This is in response to the Mayan calendar ending on 21 December 2012.
She is famous for discovering the first radio pulsars and is one of the great minds in physics.
Cheers Physics (the physics of beer)
Physicist Rik Sargent meets Andy Moffat, a real ale brewer in North London with Redemption Brewing.
They discuss the science involved in controlling the taste and colour of beer, focusing on the mashing of the grains and the temperatures involved in the brewing process.
Physicist Rik Sargent talks to Josh and Andy from Redemption Brewing who are experts in perfecting their real ale. They discuss how the sugar and alcohol affect the density of the beer and how to measure the ABV (alcohol by volume) in beer.
Physicist Rik Sargent chats to Andy from Redemption Brewing about why temperature is important in brewing a good beer. They also discuss hops and how they work efficiently by incorporating physics into their process.
Physicist Rik Sargent chats to Andy from Redemption Brewing about how the isinglass is used to clarify you beer towards the end of the brewing process.
Physicist Rik Sargent chats to Andy from Redemption brewing about the physics behind keeping beer separate from oxygen in the air when moving it to a conditioning tank. Exposure to oxygen causes reactions in beer that lead to unwanted flavours. Therefore the physics of storing beer is paramount for keeping beer tasting its best.
Physicist Rik Sargent talks to Josh and Andy from Redemption Brewing who are experts in perfecting their real ale. They discuss how the sugar and alcohol affect the density of the beer and how to measure the ABV (alcohol by volume) in beer.
Physicist Rik Sargent chats to Andy from Redemption Brewing about why temperature is important in brewing a good beer. They also discuss hops and how they work efficiently by incorporating physics into their process.
Physicist Rik Sargent chats to Andy from Redemption Brewing about how the isinglass is used to clarify you beer towards the end of the brewing process.
Physicist Rik Sargent chats to Andy from Redemption brewing about the physics behind keeping beer separate from oxygen in the air when moving it to a conditioning tank. Exposure to oxygen causes reactions in beer that lead to unwanted flavours. Therefore the physics of storing beer is paramount for keeping beer tasting its best.
Monday, 3 December 2012
Hewitt-Drew-it! 25. Conservation of Momentum
Paul shows how Newton's laws lead to the impulse-momentum relationship, which then leads to the conservation of momentum.
Other Hewitt-Drew-it! videos
Other Hewitt-Drew-it! videos
Weird Surface Tension - Sixty Symbols
Sixty Symbols regulars Roger and James are part of a team investigating surface tension in granular systems. Their new paper is published at http://prl.aps.org/abstract/PRL/v109/i22/e228002
Other Sixty Symbols videos
Other Sixty Symbols videos
Sunday, 2 December 2012
Dark Energy
The universe is huge and getting bigger all the time, and we have we have dark energy - the most mysterious force in the universe - to blame/thank for it. Thought to make up more than 70% of the energy in the whole universe, Hank describes how dark energy was theorized to exist, and how scientists are trying to explain it.
Other Sci-Show videos
Other Sci-Show videos
Dark matter is a circus master in the universe
The expansion of the universe, the big bang and dark matter. Astronomers talk us through what we know and don't know about the universe.
Saturday, 1 December 2012
From Kepler to Webb: The History of the Telescope
Hank regales us with the history of the telescope, and then introduces us to some folks from the team who are working on the newest telescope in the chronology - the James Webb Space Telescope, an infrared telescope due to launch in 2018.
Thanks to the team at Northrop Grumman for allowing us the privilege of touring their facility, and to the scientists at NASA Goddard Space Flight Center for their help with this video.
Other Sci-Show videos
Other Sci-Show videos
How Big is the Universe?
Explains how astronomers have learnt to measure the distance to the stars. How many stars are in the observable universe and is it possible to comprehend the size of it all?
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