How did they discover the conversion Factors? For example if you want to convert 1 kg to 1 pound you multiply the mass value by 2.205. So who determined '2.205' and why
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What is a "ton" of carbon dioxide anyway? | A New Shade of Green | Sherry Listgarten | Palo Alto Online
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How to convert kilograms to tonnes and tonnes to kilograms||ton to kg convert||kg to ton Convert - YouTube
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