Nuts and bolts. SAE, Metric, or both
I been wrenching on vehicles all my life. It use to be only SAE, then it became a mix of SAE and Metric. I thought they we're going to phase out SAE and go all metric at some point, but it seems like ...
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Then there is the small problem that the base units of the original metric (French) were all in error.
The distance from the pole to the equator was never actually measured when they established the meter, just calculated based on bad French surveys.
The degree "Centigrade" => Now Celsius was supposed to based on temperatures of freezing and boiling of water and they did not use pure water and did not correct for atmospheric pressure. They also found out the "Centigrade" had been used elsewhere.
The Ton was established on a flawed unit of measure for the mass (not weight) of cubic meter of water. (Let's not go back there.) And a Gram is just 1/1000 of that.
A Newton that is the unit of weight or force, is based on accelerating and 1 Kg mass at 1 M/s.......
The US meter is now established as distance light travels in 1/299792458 of a second. It was changed from wave lengths of a Krpyton 86 lamp.
It all is really just more accepted than the English units, it is no better.
Matt
The distance from the pole to the equator was never actually measured when they established the meter, just calculated based on bad French surveys.
The degree "Centigrade" => Now Celsius was supposed to based on temperatures of freezing and boiling of water and they did not use pure water and did not correct for atmospheric pressure. They also found out the "Centigrade" had been used elsewhere.
The Ton was established on a flawed unit of measure for the mass (not weight) of cubic meter of water. (Let's not go back there.) And a Gram is just 1/1000 of that.
A Newton that is the unit of weight or force, is based on accelerating and 1 Kg mass at 1 M/s.......
The US meter is now established as distance light travels in 1/299792458 of a second. It was changed from wave lengths of a Krpyton 86 lamp.
It all is really just more accepted than the English units, it is no better.
Matt
