"Fearless Felix" approaches speed of sound in second Red Bull Stratos jump: "Skydiver "Fearless Felix" Baumgartner has done it again - successfully carrying out an 18.3 mile (29.5 km) skydive from the Red Bull Stratos balloon high above Roswell, NM. His top speed was 536 mph (865 km/h). At that altitude, the speed of sound is about 673 mph (1083 km/h), so Baumgartner's top speed was Mach 0.80!"
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Friday, July 27, 2012
UCLA produces transparent solar cells that harness infrared light
UCLA produces transparent solar cells that harness infrared light: "A UCLA team has developed a new type of solar cell that is nearly 70 percent transparent to the naked eye. The plastic cells, which use infrared instead of visible light, are also more economical than other types of cells because they are made by an inexpensive polymer solution process and nanowire technology, potentially paving the way for cheaper solar windows."
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