試題詳解

2. It is known that all mechanical quantities, including the universal constants G, c and ħ, can be expressed in terms of length, time, and mass. In SI units, where the base of unit of length is meter (m), time is second (s), and mass is kilogram (kg), the three universal constants are G = 6.67 × m³ ﹒s²﹒, c = 3.00 × 10⁸ m. s¯¹, and ħ = 1.05 × m². . kg. In another unit system, the base units of length, time, and, mass are denoted as lp, tp, and mp, respectively, so that G = , c = . mp. What is lp in SI units?
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