I don't know if this is the right forum for this, but there was at least 1 debate-ish thread in here
Most countries in the world today use the metric system of units, but the United States is an exception, insisting on a variation of the old British system of miles, pounds, gallons, and such. Do you think that the United States should finally go ahead and make the switch to metric measurements?
I say yes. Here are some reasons:
- The metric system really is very easy to learn and understand. First, you start with base units like the metre, litre, and gram. (Yes, I know that the kilogram is the actual base unit for deriving other units such as the newton, but the gram is the base unit for naming other units of mass.) Then, you add prefixes that always mean the same thing. Kilo- always means 1000, so a kilometre is 1000 metres, a kilogram is 1000 grams, etc. Even if you've never heard of, say, a kilojoule, you know it has to be 1000 joules, so if you later see a mention of joules, or megajoules, or whatever, you already know how to convert them. There are even some special relationships between units of measurement. Plug in kilograms, metres, and seconds into F = ma directly and you get newtons right away. One cubic metre is exactly 1000 litres, and a litre of water weighs approximately 1 kilogram. Temperature is easy too. Which numbers are easier to learn and remember, 0 and 100 or 32 and 212?
- Easy conversion of units: just move the decimal point. If you want to know what 17 kilometres is in metres, just add 3 zeroes to the end to get 17000 metres. If you want to know 17 miles in feet, you'll probably reach for the calculator because few people can multiply by 5280 in their heads. Division is just as easy. You know that 3175 metres is a bit over 3 kilometres just by looking at the number and mentally moving the decimal point 3 places to the left.
- It's already the standard unit system of science. If everything else was metric too, we wouldn't need all these crazy feet-pounds and pounds-force and slugs and such. Mars Polar Lander, anyone?
- Other countries use it. My experience from the Internet is that using American units tends to confuse people from metric countries, especially considering how tricky the US unit system is. Sometimes I think the USA need to realize that it is not a deity, but rather a country just like all the others and should follow international rules.
- Units of measurement in the metric system always have the same value. A US gallon is different from an Imperial gallon, and the amount of weight an ounce or pound is, and even the number of ounces in a pound, depends on what substance you're weighing. A 150-pound human and 150 pounds of gold don't have the same weight. There are also similarly-named and similarly-valued units that are actually different, like the statute mile and the nautical mile.
- Both systems are littered with little-used units, but this isn't much of a problem in the metric system because of the regular formation of units. I don't think too many people use the decigram, but if you know that deci- means 1/10 and you know what a gram is, you know what a decigram is. How many people would be able to figure out that a rod is 16.5 feet?
- The kids learn the metric system in schools anyway. When I was in public school (1992-2005), I think we learned more about metric units than about US units. We had to know the prefixes from milli- to kilo- in order, and we worked a lot with metres, litres, grams, and degrees Celsius. They don't have to add a huge chunk to the curriculum because it's already there.
(Yes, I know I haven't been making the metric/SI distinction above, but the SI system seems to basically be a restricted version of the metric system.)
____________________ ~Terra
TKB Super Mario Bros. - Complete
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