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Why do scientists try to force the metric system and significant figures on Americans?
They always say how the metric system is superior because it uses units of 10 and 100 so can easily be calculated, but why does that mean the rest of us should use it? After all, our clock is divided into 12 hours (just like the foot), a circle has 360 degrees which divides evenly by 12 but not by 100, and it is so well embedded into our culture.
So then what about significant figures...where you can only use the number of digits you start with? If you have 5, divide by 2, you have 2.5 but have to round up to 3 because of significant figures. So then you want to get back to where you were, you multiply that result by 2 and you get 6. So 5 and 6 are essentially the same thing, in a scientists mind, by that rationale. I mean, I understand you can't say that you are able to divide 5 by 2 and get 2.50000000 exactly, but let's use a little common sense here people! Anyone else feel the same way?
Units such as metres, feet, pounds, kilograms do not have a natural meaning. They were simply chosen to make it easier to communicate different quantities. You can also invent your own units, but it would be difficult to get people to accept them.
Scientists do not force them on people. Metric units were designed to make calculation easier and convenient. They are not in any way superior to other units. They are only convenient when it comes to calculations because it does not have conversion constants.
When they were introduced, the American system was already widely in use in America while the imperial system was already been used in many countries. This is what made it difficult to change over to the new system. This is also the reason why most aviation measurements are in gallons, pounds, feet etc rather than metres and kilograms.
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