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Concrete and Carbon Black Supercapacitors
Carbon black is a finely divided form of shapeless carbon, that remains as soot after…
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Battery Experiments
Make a Photovoltaic Cell with a Diode
Diodes are two-terminal, asymmetric electronic components. They conduct current in one direction, owing to their…
Climate Change
Iowa Black Gold Soil in Crisis Underground
When settlers first arrived in Iowa they found soil so rich they called it Iowa…