1. Why does a measurement need both a 'number' and a ‘unit for its complete
specification?
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Answer:
A measurement needs both a number and a unit for complete specification because : If we just say 6, the other person will not understand what we mean; hence we have to use a unit of length. If we just say metres, the person will wonder how many metres; therefore we have to tell the number to express the right quantity.
Explanation:
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