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Cathodic protection is a technique for controlling corrosion on a metal surface by making it the cathode of an electrochemical cell. This is usually accomplished…

Electromagnetism is a discipline of physics that studies electromagnetic force, one of the four fundamental forces in nature. In physics, it refers to the interaction…

A flyback transformer is a type of transformer that generates high voltage in electrical circuits, usually in the form of short pulses. A line output…

Global catastrophic risk refers to occurrences or scenarios that have the potential to severely destroy human civilization on a worldwide scale. These dangers have the…

A mid-ocean ridge (MOR) is a seafloor mountain system created by plate tectonics. It is a massive undersea mountain range that spans the world’s oceans.…

Atomic hydrogen welding (AHW) is a welding technology invented in the early twentieth century, primarily for combining metals such as aluminum and magnesium. It is…

A variable-frequency transformer (VFT) transmits electricity between two (asynchronous or synchronous) alternating current frequency domains. A Variable-Speed Drive (VSD) or Adjustable-Frequency Drive (AFD) is a…

Nikola Tesla invented the Tesla coil, which is an electrical resonant transformer circuit, about 1891. It is used to generate high-voltage, low-current, high-frequency alternating current…

A spark-gap transmitter is an early type of radio transmitter that generates radio waves to communicate. It is an old type of radio transmitter that…

An ignition coil is an essential part of an internal combustion engine’s ignition system. It is used in the ignition system of a spark-ignition engine…

Urban climatology is the study of urban climates. It is a subfield of climatology that investigates climate in urban contexts. It is a subfield of…

Oceanic trenches are long, narrow, and very deep depressions in the ocean floor. They are the deepest sections of the Earth’s oceans, generated mostly by…