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Foreign exchange reserves, also called Forex reserves, in a strict sense, are foreign-currency deposits held by nationals and monetary authorities.However, in popular usage and in the list below, it also includes gold reserves, special drawing rights (SDRs) and IMF reserve position because this total figure, which is usually more accurately termed as official reserves or international reserves ...
In physics, mass–energy equivalence is the relationship between mass and energy in a system's rest frame, where the two quantities differ only by a multiplicative constant and the units of measurement. [1] [2] The principle is described by the physicist Albert Einstein 's formula: . [3] In a reference frame where the system is moving, its ...