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SCOPE AND UNITS. Magnitude is all that property of matter that can be measured. We measured the longest univerbar and widest of a notebook can also measure the length of a window. Like manner as the amount of matter in a orange troban a basket. Thus we measured the following factors: length and mass.
Fundamental quantities: those that can be obtained directly. The most important are: length, mass, temperature, time and intensity. Derived quantities: those who need the fundamental quantities to calculate them. For example the volume (m 3) comes from the scale length, ie, that m = m 3 m m.
Temperature
Derived quantities
m / s 2
Measure: is to compare the magnitude that we obtained with another taken as a standard or measure. For example, measure the length of a table means to compare it with a tape measure or a timber that is taken as a pattern.
These figures must be written with the same unit worldwide. Because if all units were written with known quantities in England, Spain or the United States, no scientist on Earth could understand scientific papers or other documents. To avoid this problem it is important that everyone write the units and the International System of Units (SI).
10 -3
atto
Zeta
M

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