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One thousand microns is equal to

  • A.10−3 m
  • B.10−6 m
  • C.10−9 m
  • D.10−12 m

Answer: A

One thousand microns is \(10^{-3}\) m.

\[1000 \times 10^{-6}\ \mathrm{m} = 10^{-3}\ \mathrm{m}\] which is one millimetre. The micron, now called the micrometre, is \(10^{-6}\) m.

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