Convert quarter (US) to Planck mass
Please provide values below to convert quarter (US) [qr (US)] to Planck mass [m_P], or Convert Planck mass to quarter (US).
How to Convert Quarter (Us) to Planck Mass
1 qr (US) = 521018403.653623 m_P
Example: convert 15 qr (US) to m_P:
15 qr (US) = 15 × 521018403.653623 m_P = 7815276054.80434 m_P
Quarter (Us) to Planck Mass Conversion Table
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Quarter (Us)
A quarter (US) is a unit of weight equal to one-fourth of a pound, commonly used in measuring precious metals and other small quantities.
History/Origin
The quarter originated from the traditional British weight system and was adopted in the United States as a subdivision of the pound. It has historically been used in commerce and trade for precise measurements.
Current Use
Today, the quarter is primarily used in the United States for measuring precious metals, jewelry, and small quantities of certain commodities. It is part of the customary units in the 'Weight and Mass' category within common converters.
Planck Mass
The Planck mass (m_P) is a fundamental physical constant representing a mass scale derived from natural units, approximately 2.176 × 10^-8 kilograms.
History/Origin
Introduced by Max Planck in 1899 as part of his system of natural units, the Planck mass emerged from combining fundamental constants to define a universal mass scale in theoretical physics.
Current Use
The Planck mass is primarily used in theoretical physics, especially in quantum gravity and high-energy physics, to express natural units and scale phenomena near the Planck scale.