单词 | coherent units |
释义 | coherent units A system of units of measurement in which derived units are obtained by multiplying or dividing base units without the use of numerical factors. SI units form a coherent system; for example the unit of force is the newton, which is equal to 1 kilogram metre per second squared (kg m s-2), the kilogram, metre, and second all being base units of the system |
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