Activities/Sliderule: Difference between revisions

Revision as of 05:41, 23 August 2010 view source Tonyforster (talk \| contribs) 2,486 edits →How does it work ← Older edit		Revision as of 05:43, 23 August 2010 view source Tonyforster (talk \| contribs) 2,486 edits →How does it work Newer edit →
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	The multiplication of 100 by 1000 can be represented as 10<sup>2</sup> x 10<sup>3</sup> =10<sup>5</sup>, to multiply, just add the indices, in this case, 2+3=5. 2 and 3 are the logarithms of 100 and 1000 respectively.		The multiplication of 100 by 1000 can be represented as 10<sup>2</sup> x 10<sup>3</sup> =10<sup>5</sup>, to multiply, just add the indices, in this case, 2+3=5. 2 and 3 are the logarithms of 100 and 1000 respectively.

	To multiply, add the logarithms, to divide, subtract. See how the C and D scales are compressed to their right end . Though the scales are marked with numbers, their distance along the scales are proportional to the logarithms of those numbers. When two distances are added, the logarithms of the ~~marked~~ numbers are added, if logarithms are added, numbers are multiplied.		To multiply, add the logarithms, to divide, subtract. See how the C and D scales are compressed to their right end . Though the scales are marked with numbers, their distance along the scales are proportional to the logarithms of those numbers. When two distances are added, the logarithms of the numbers are added, if logarithms are added, numbers are multiplied.