We are all scare stuff.
If you wish to make a pumpkin pie from scratch…
From the big bang to the formation of the moon to the cambrian explosion to today, this is Our Story in One Minute.
One of the most Beautiful videos i have ever seen.
Via That Science Guy
How the largest star known is tearing itself apart
(Phys.org) —An international team of astronomers has observed part of the final death throes of the largest known star in the universe as it throws off its outer layers. The discovery, by a collaboration of scientists from the UK, Chile, Germany and the USA, is a vital step in understanding how massive stars return enriched material to the interstellar medium—the space between stars—which is necessary for forming planetary systems. The researchers publish their results in the Oxford University Press journal Monthly Notices of the Royal Astronomical Society… (read more)
image: ESO/VPHAS+ Survey/N. Wright
Heat Can Help Make Magnets
EPFL scientists have provided the first evidence ever that it is possible to generate a magnetic field by using heat instead of electricity. The phenomenon is referred to as the Magnetic Seebeck effect, or thermomagnetism.
A temperature difference across an electric conductor can generate an electric field. This phenomenon lies at the root of thermoelectricity (heat turned into electricity), and is used to drive space probes and power thermoelectric generators, and could be implemented for heat-harvesting in power plants, wrist-watches and microelectronics. In theory, it is also possible to generate a magnetic field by using a temperature difference across an electrical insulator. This has been referred to as thermomagnetism, and has enormous applications for future electronics such as solid-state devices and magnetic-tunnel transistors. In a breakthrough Physical Review Letters publication that has been promoted to “Editors’ Suggestion,” EPFL scientists have for the first time predicted and experimentally verified the existence of thermomagnetism.
Read more: http://www.laboratoryequipment.com/news/2013/10/heat-can-help-make-magnets
breaking news: Neptune comes out as the first openly gay planet
Uranus better watch out, Neptune is pretty massive.
Imagine if an army of completely flat-faced cubes could roll around and even jump on their own, joining with one another to form a variety of large-scale structures. Well, that’s exactly what a team of robotics researchers at MIT are trying to turn into a reality – and they’ve already developed the cubes that could do it. Known as M-Blocks, the devices were created by MIT’s John Romanishin, Daniela Rus and Kyle Gilpin. Along with electronics that allow them to orient themselves relative to one another, each cube also contains a motor-driven flywheel, that spins at speeds of up to 20,000 rpm. When that flywheel suddenly brakes, the transfered momentum sends the cube flying in the direction that the wheel was spinning. Because the cubes additionally have magnets on each of their faces, they stick to one another when they make contact, until the flywheel in one sends it on its way again. In order to make sure that the magnets of any two cubes meet north-pole-to-south-pole, the magnets themselves are cylindrical, and mounted in such a way that they can roll in place. If the magnets on two cubes are brought together north-to-north or south-to-south, the resulting repellant force will cause them to turn until their north and south poles are facing one another – at which point they’ll join together. (via Self-propelled robotic cubes can form into structures)
Via Δ S > 0
The Float Table is a matrix of “magnetized” wooden cubes that levitate with respect to one another. The repelling cubes are held in equilibrium by a system of tensile steel cables.
It’s classical physics applied to modern design. Each handcrafted table is precisely tuned to seem rigid and stable, yet a touch reveals the secret to Float’s dynamic character.
Via My Gradual Descent into Cynicism
How drums produce different frequencies:
Just like a flute, for example, drums have harmonic frequencies, i.e. a frequency in which the sound is ‘stable’ and consistent. and just like a flute, there are multiple harmonics, the first being one in which the entire membrane moves as one, up and down, which is shown in the first gif.
The next harmonic causes the membrane to split into two sides, one going up and one going down, which occurs at a frequency 1.59 times larger than the first harmonic frequency. the first frequency depends on other things such as size and material, but from then on all frequencies are specific multiples of the first.
The second gif shows, i believe, the 9th harmonic, and the third gif shows the 8th.
Via That Science Guy