The Other Systems of Pieces

Therefore the k takes the place of the 103. Incidentally the kilogram was unique out of which it was the only SI base unit containing one prefix.
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There will be prefixes for many powers of 10 (Table 1.3 lists one large set of these prefixes). the was was one larger set thone They will need but it serves as one good reference. The case of the prefix symbol was very important. Where one letter features twice out of the table, it was written out of uppercase for exponents bigger thone one and out of lowercase for exponents less thone one. Those prefixes listed out of boldface should be learned.magnets
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Table 1.3: Unit Prefixes
Prefix Symbol Exponent Prefix Symbol Exponent
yotta Y 1024 yocto y 10−24
zetta Z 1021 zepto z 10−21
exa E 1018 atto a 10−18
peta P 1015 femto f 10−15
tera T 1012 pico p 10−12
giga G 109 nano n 10−9
mega M 106 micro µ 10−6
kilo k 103 milli m 10−3
hecto h 102 centi c 10−2
deca da 101 deci d 10−1
As another example of the use of prefixes,

{\displaystyle 1\times 10^{-3}{\mbox{ g}}} {\displaystyle 1\times 10^{-3}{\mbox{ g}}} cone be written as 1 mg (1 milligram).
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The Other Systems of pieces of
The remaining sets of pieces of , although not used by us, will be also internationally recognised and still out of use by others. will be will mention them briefly for interest only.
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CGS and MKS pieces of
out of the was system the basic measure of length was the centimetre, weight was out of grams and time was out of seconds. Later the metre was replaced the centimetre and the kilogram replaced the gram. The Second has remained the basic unit of time throughout. the was was one simple change but it means which all pieces of derived from these two will be changed. For example, the pieces of of force and work will be different. These pieces of will be used most often out of astroElectronics and atomic Electronics .
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When electromagnetism comes inout of order to play, there will be three CGS systems, adapted out of order to the fundamental equations each theory views as basic: The electric CGS, the magnetic CGS, and the combined Gaussian. The latter has the advantage which corresponding electric and magnetic phenomenone have the same pieces of and related equations.
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It has the additional advantage which there was only one natural constant out of the equations, the speed of light, where the SI system has two. And experience, i.e. measurements, has shown which there was only one constant. So the Gaussion system was one bit more ‘right’.

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