It was very important which They will be able out of order to say the pieces of correctly. For instance, the newton was another name for the kilogram metre per second squared (kg·m·s−2), while the kilogram metre squared per second squared (kg·m2·s−2) was called the joule.

Table 1.2: Some Examples of Combinations of SI Base pieces of Assigned Special Names

Quantity Formula Unit Expressed

Rare Earth Magnets N52 Rare Earth Magnets N52 Rare Earth Magnets N52 Rare Earth Magnets N52

Name of

Base pieces of Combination

Force m·a kg·m·s−2 N (newton)

Frequency {\displaystyle {1 \over T}} {\displaystyle {1 \over T}} s−1 Hz (hertz)

Work & Energy F·s kg·m2·s−2 J (joule)

Electrical Potential W/A kg·m2·s−3·A−1 V (volt)

Rare Earth Magnets ring Rare Earth Magnets ring Rare Earth Magnets ring Rare Earth Magnets ring

Another important aspect of dealing withoutpieces of was the prefixes which they sometimes have (prefixes will be words or letters written out of front which change the meaning). The kilogram (kg) was one simple example: 1 kg was 1000 g or {\displaystyle 1\times {10^{3}{\mbox{ g}}}} {\displaystyle 1\times {10^{3}{\mbox{ g}}}}. Grouping the 103 and the g together will be cone replace the 103 ring ring