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Latest Speed of Sound Stories

2013-07-11 12:26:21

Scientists at the UK's National Physical Laboratory (NPL) have performed the most accurate measurement yet of the Boltzmann constant. While the impact of such an achievement is not immediately obvious, the measurement could revolutionize the way we define temperature, replacing the standard method that has been used for over 50 years. The new measurement is 1.380 651 56 (98) × 10−23 J K−1, where the (98) shows the uncertainty in the last...

2012-04-10 10:10:42

The coupled normal mode method is a powerful approach for solving range-dependent propagation problems in underwater acoustics. An important area of study is to improve stability and efficiency so as to be able to deal with complex scenarios in a realistic environment. Professor LUO Wenyu and his group from the State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, set out to tackle this problem. After several years of innovative research, they have developed...

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2009-07-31 08:05:00

This summer, one of the world's leading ocean science bodies, the United Nations Educational, Scientific and Cultural Organization's (UNESCO's) and Intergovernmental Oceanographic Commission (IOC) adopted the new international thermodynamic equation of state for seawater called TEOS-10. A complex, dynamic mixture of dissolved minerals, salts, and organic material, seawater has historically presented difficulties in terms of determining its physical chemical properties.For 30 years, climate...

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2008-12-25 12:26:10

Coldplay says it wanted to offer its fans a Christmas present by offering a free download of a remixed version of the British band's hit, Viva la Vida. The Daily Telegraph said Wednesday the Speed of Sound band is offering the musical single free online along with a Happy Christmas Folks greeting for its loyal fans. The band's lead singer, Chris Martin, also jokes on the its Web site about a new featured video that features actor Simon Pegg. The video shows the Shaun of the Dead star singing...

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2008-05-21 15:23:51

A new theory claims that so-called "shadow bands," which sometimes pass across the ground during an eclipse, might be produced by sound pulses. These bands, which pass across the ground during totality"”when the Moon completely covers the sun, are considered by some to be caused by atmospheric turbulence. However, astrophysicist Dr. Stuart Eves says shadow bands could be caused by something called infrasound. Before totality, these bands have been observed to pass over the ground in the...


Word of the Day
negawatt
  • A unit of saved energy.
Coined by Amory Lovins, chairman of the Rocky Mountain Institute as a contraction of negative watt on the model of similar compounds like megawatt.