What are the two important things to be mentioned when specifying the measurement of a physical quantity?

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Solution

A physical quantity is a property of an object, by something we can measure with instruments.
The two important things to be mentioned when specifying the measurement of a physical quantity are magnitude and unit.
Measurement is defined as the process of comparison of an unknown quantity with a known or standard quantity.
A measurement unit is a standard quantity used to express a physical quantity
Hence, the two important things to be mentioned when specifying the measurement of a physical quantity are magnitude and unit.

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