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Monday, January 21, 2013

The Superfluid.

Helium II will "creep" along surfaces in order to find its own level - after a short while, the levels in the two containers will equalize. The Rollin film also covers the interior of the larger container; if it were not sealed, the helium II would creep out and escape.

Superfluidity is a state of matter in which viscosity of a fluid vanishes, while thermal conductivity becomes infinite. These unusual effects are observed when liquids, typically of helium-4 or helium-3, overcome friction in surface interaction at a stage (known as the "lambda point", which is temperature and pressure, for helium-4) at which the liquid's viscosity becomes zero.

Saturday, January 12, 2013

Eisenstein view of space-time is right.

Einstein's theory of general relativity predicted that the space-time around Earth would be not only
warped but also twisted by the planet's rotation. Gravity Probe B showed this to be correct.
(Image: NASA)

Scientists traced the journey of photos from a gamma-ray burst that originated 7 billion light years away to determine the shape of space-time.

How to tune an electric guitar.

Jimi Hendrix fender guitar

The electric guitar has become a staple in jazz, rock and pop music. Today, many of us couldn't even imagine our favorite tunes without the influences of Chuck Berry, B.B. King, Eric Clapton, Jimmy Page and countless others — and who could forget how Jimi Hendrix forever changed the American national anthem?

Saturday, January 05, 2013