On  Sep 22 , at 12:44 PM, Teran McKinney wrote:


Metric is so beautiful in comparision:
200ml -> 0.2l
200l -> 0.2kl

200mg -> 0.2g
200g -> 0.2kg

It's even more beautiful if you follow the rule that there should always be a space between the number and the unit. Your list should read:
200 ml -> 0.2 l
200 l -> 0.2 kl

200 mg -> 0.2 g
200 g -> 0.2 kg

The value of such a practice is very clearly seen in the value of two tenths of a litre; you have written it as "0.2l" which can easily be misread as "twenty-one hundredths" because the el (l) looks an awful lot like a one (1). In some fonts they are identical. Writing it as "0.2 l" makes it clear (or at least a little clearer) the the "l" is an el for litre not a one.

Similarly, your 200l looks suspiciously like "two thousand one". Writing "200 l" instead helps to make it clear that it represents 200 of something and the "l" will then be interpreted as the litre symbol.

(One can also use the capital "L" for litre to reduce the ambiguity further. Currently both "l" and "L" are correct but CGPM promotes the idea that eventually one or the other should be universally adopted and the other deprecated.)

In an admitted minor point, I wonder why you used the cute little arrow ( -> ) instead of just using an equals sign.

I interpreted the arrow this way (for example):
"200 mg -> 0.2 g" means "200 mg converts to 0.2 mg". That leaves me with the subtle concern that maybe the reverse is NOT true! Of course, it should be understood to mean that the conversion works either way. But, since it works both ways, then shouldn't the arrow point both ways; wouldn't it then be more appropriate to write it as "200 mg <--> 0.2 g"?

Then again, why not just use an equals sign which is readily interpreted to mean the two are EQUAL so that it can be used to convert either way.

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