Convert pennyweight to Electron mass (rest)
Please provide values below to convert pennyweight [pwt] to Electron mass (rest) [m_e], or Convert Electron mass (rest) to pennyweight.
How to Convert Pennyweight to Electron Mass (Rest)
1 pwt = 1.70722179563467e+27 m_e
Example: convert 15 pwt to m_e:
15 pwt = 15 × 1.70722179563467e+27 m_e = 2.560832693452e+28 m_e
Pennyweight to Electron Mass (Rest) Conversion Table
| pennyweight | Electron mass (rest) |
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Pennyweight
The pennyweight (pwt) is a unit of weight traditionally used in measuring precious metals and gemstones, equivalent to 1/20 of a troy ounce or 1.555 grams.
History/Origin
Originating in the medieval period, the pennyweight was used in the troy weight system for weighing gold and silver, especially in the jewelry and precious metals industries. Its use has persisted in certain regions and industries for historical and practical reasons.
Current Use
Today, the pennyweight is primarily used in the jewelry trade and precious metals markets to specify weights of gold, silver, and gemstones, especially in the United States and in contexts where precise measurement of small quantities is required.
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.