Convert grain to Electron mass (rest)
Please provide values below to convert grain [gr] to Electron mass (rest) [m_e], or Convert Electron mass (rest) to grain.
How to Convert Grain to Electron Mass (Rest)
1 gr = 7.11342414847778e+25 m_e
Example: convert 15 gr to m_e:
15 gr = 15 × 7.11342414847778e+25 m_e = 1.06701362227167e+27 m_e
Grain to Electron Mass (Rest) Conversion Table
| grain | Electron mass (rest) |
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Grain
A grain is a unit of mass traditionally used to measure small quantities, primarily in the context of precious metals, pharmaceuticals, and firearms.
History/Origin
The grain dates back to ancient times and was originally based on the weight of a single seed of a cereal grain, such as barley. It has been used since the Middle Ages and was standardized in the apothecaries' system.
Current Use
Today, the grain is mainly used in the measurement of bullets, gunpowder, and precious metals, and is recognized as a unit of mass in the apothecaries' system, although it has largely been replaced by grams in most contexts.
Electron Mass (Rest)
The electron mass (rest) is the invariant mass of an electron, approximately 9.10938356 × 10⁻³¹ kilograms, representing the mass of an electron at rest.
History/Origin
The electron mass was first measured in the early 20th century through experiments involving cathode rays and later refined with advancements in particle physics, establishing it as a fundamental constant in physics.
Current Use
The electron mass is used in calculations involving atomic and subatomic physics, quantum mechanics, and in defining units related to particle properties, such as in the 'Weight and Mass' converter for scientific and educational purposes.