All complex technical products like cars, airplanes, or even bicycles are equipped with other, less complex technical parts, like engines and gears or bicycle frames, to ensure their functionality. These smaller technical components again are assembled from basic parts like housings, screws,...
Modern life depends strongly on (mobile) electrical power, which is provided by batteries. No cellular phone, notebook, tablet or car could be operated without a proper working battery. Since Allesandro Volta first built and utilized a primary battery, a
large number of batteries of various...
Coal is one of the most important fossil fuels. In 20118, the global stone coal output was about 7 billion metric tons. A huge amount of the worldwide traded stone coal is mined in China, USA, Russia, and India. Compared to the very large amount of mined coal the required sample volume for the...
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