Convert scruple (apothecary) to Electron mass (rest)
Please provide values below to convert scruple (apothecary) [s.ap] to Electron mass (rest) [m_e], or Convert Electron mass (rest) to scruple (apothecary).
How to Convert Scruple (Apothecary) to Electron Mass (Rest)
1 s.ap = 1.42268482969556e+27 m_e
Example: convert 15 s.ap to m_e:
15 s.ap = 15 × 1.42268482969556e+27 m_e = 2.13402724454333e+28 m_e
Scruple (Apothecary) to Electron Mass (Rest) Conversion Table
| scruple (apothecary) | Electron mass (rest) |
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Scruple (Apothecary)
A scruple (s.ap) is an old unit of weight used in apothecary measurements, equivalent to 1.3 grains or approximately 1.3 grams.
History/Origin
The scruple originated in ancient Greece and was adopted into Roman and medieval European apothecary systems. It was historically used for measuring small quantities of medicinal substances and drugs.
Current Use
Today, the scruple is largely obsolete and replaced by metric units, but it is still referenced in historical contexts and traditional apothecary practices.
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.