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：2025/12/03
Planck mass
（ plural ）
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(physics) The unit of mass in the system of Planck units, defined as: m_P=√≈2.1765⨯10⁻⁸ mbox kg
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Planck mass
In certain quantum gravity models, the Planck mass sets the scale at which classical descriptions of spacetime break down.
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In certain quantum gravity models, the Planck mass sets the scale at which classical descriptions of spacetime break down.
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