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radian 2πrad =360° 1πrad =180°
1°=π/180 rad(about 57.29578°)
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(2012.06.28)[phys.org news] 美國萊斯大學設計出 鋰-離子 (lithium-ion)噴漆式電池

Reasercher develop paintable battery :Technique could turn surface in to lithium-ion battery
Researchers at Rice University have developed a lithium-ion battery that can be painted on virtually any surface.

Conventional lithium-ion batteries wrap active layers into a canister or other portable container. But Rice University researchers have found a way to paint those layers onto any surface, which opens up the possibility of turning those surfaces into storage devices. Credit: Neelam Singh/Rice University

 
create painted batteries in the open air !!!! 
"Researchers at Rice University have developed a lithium-ion battery that can be painted on virtually any surface." 

影片介紹 :



有興趣的 可以看這則新聞: http://phys.org/news/2012-06-paintable-battery-technique-surface-lithium-ion.html 
或萊斯大學網站 http://news.rice.edu/2012/06/28/rice-researchers-develop-paintable-battery-2/
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