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Most fuel cells are powered by hydrogen, which can be fed to the fuel cell system directly or can be generated within the fuel cell system by reforming hydrogen-rich fuels such as methanol, ethanol, and hydrocarbon fuels. Direct methanol fuel cells (DMFCs), however, are powered by pure methanol, which is usually mixed with water and fed directly to the fuel cell anode.
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With the imminent release of ‘s new book, and historic launch of SpaceX‘s reusable Falcon Heavy rocket, the Wall Street Journal invited Dr. Kaku to share his insights as a physicist, futurist, and bestselling author with WSJ subscribers in an essay entitled "" The article is out now.
(a) How would you explain the fact that there were 16 manoeuvering rocket nozzles on the lunar module (4, as crosses, on each superior vortex of it) and there is not a single footage of them firing although you can see the vehicle manoeuvering in space (yaw, pitch and roll)?.The fuels used in the RCS thrusters burned with a colourless flame which is extremely difficult to see.