Physics

metres


ANSWER

$$10^{-1}$$


SOLUTION
1 mm is $$1\times { 10 }^{ -3 }m$$.
So, $$326mm = 3.26\times1\times { 10 }^{ 2 }\times { 10 }^{ -3 }m$$.
Hence its order of magnitude in metres is $${ 10 }^{ -1 }m$$
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