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Stating orders of magnitude for real-world values, e.g. height of Everest, diameter of a atom.

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We want to measure the $\\var{options[1][1]}$.

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The options you have been given are

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$10^{\\var{options[0][3]}}$ metres = $\\var{options[0][4]}$

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$10^{\\var{options[1][3]}}$ metres = $\\var{options[1][4]}$

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$10^{\\var{options[2][3]}}$ metres = $\\var{options[2][4]}$

\n

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We want an order of magnitude, not a precise value, and therefore the sensible choice is 
$10^{\\var{options[1][3]}}$ metres = $\\var{options[1][4]}$

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\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
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Scale Factor

\n
NameSymbol
\n

$10^{12}$

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teraT
$10^9$gigaG
$10^6$megaM
$10^3$kilok
$10^{-1}$decid
$10^{-2}$centic
$10^{-3}$millim
$10^{-6}$micro$\\mu$
$10^{-9}$nanon
$10^{-12}$pico\n

\n

p

\n
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Working in metres, which is the correct order or magnitude for the following measurement?

\n

$\\var{options[1][1]}$

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