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Among the elements, fluorine ranks 24th in cosmic abundance and 13th in crustal abundance. Fluorite, the primary mineral source of fluorine, which gave the element its name, was first described in 1529; as it was added to metal ores to lower their melting points for smelting, the Latin verb fluo meaning ' to flow ' gave the mineral its name ...
The Wabtec FLXDrive platform (pronounced "flex-drive") is a class of battery-electric locomotives manufactured by Wabtec's GE Transportation subsidiary beginning in 2019. . Using a modified version of the GE Evolution Series platform, FLXdrive is Wabtec's first zero-emissions locomotive, storing energy in 20 racks of lithium-ion battery cell
Radiative flux, also known as radiative flux density or radiation flux (or sometimes power flux density [1]), is the amount of power radiated through a given area, in the form of photons or other elementary particles, typically measured in W/m 2. [2]