Cheesecake_Marmalade wrote:To me, any system of measurement is going to be arbitrary because it was pulled out of your ass.
Thank you for the example of talking out of your ass, C_M.
International System of Units is the official system of measurement for all nations except for
Myanmar,
Liberia, and the
United States(isn't it nice to be sPeCiAl?). However, a number of other jurisdictions have laws mandating or permitting other systems of measurement in some or all contexts, such as the United Kingdom — where the Traffic Sign Regulations only allow distance signs displaying Imperial units (miles or yards) or Hong Kong.
The metric system has been around for 100s of years and not just a recent invention created to frustrate Americans.
Reasons for it?
1. The Metric System is simple to understand. The simplicity of a base 10 system of measurement, such as the Metric System, makes it extremely easy to understand especially when dealing different scales of measures, such as meters versus kilometers. For example, it is obvious that 100 meters is 1/10 of a kilometer.
2. Calculations in the Metric System are also easier. This is why most researchers, doctors, and scientists use the Metric System
even in the United States.
How many pounds are there in 100 ounces? How many feet are there in a mile? Which is greater: 5.5 pints, 94 fluid ounces, or 3 quarts? How many square yards are there in an acre?
3. The Metric System is the international standard. Since over 90% of the world uses the Metric System, it is by default the international standard.
4. Accuracy and prevent redundancies. N.A.S.A. actually lost a $125 million dollar spacecraft, called the
Mars Climate Orbiter, over the planet Mars, because one team was using the Metric System and another team was using the Imperial System. That was a very costly mistake that could have been avoided.
http://en.wikipedia.org/wiki/Mars_Climate_OrbiterThe metric/imperial mixup which destroyed the craft was caused by a software error back on Earth. The thrusters on the spacecraft which were intended to control its rate of rotation, were controlled by a computer which underestimated the effect of the thrusters by a factor of 4.45. This is the ratio between a pound force - the standard unit of force in the imperial system - and a newton, the standard unit in the metric system. The software was working in pounds force, while the spacecraft expected figures in newtons; 1 pound force equals approximately 4.45 newtons.
The software had been adapted from use on the earlier Mars Climate Orbiter, and was not adequately tested before launch. The navigation data provided by this software was also not cross-checked while in flight. The Mars Climate Orbiter thus drifted off course during its voyage and entered a much lower orbit than planned, and was destroyed by atmospheric friction.How many pounds are there in 100 ounces? How many feet are there in a mile? Which is greater: 5.5 pints, 94 fluid ounces, or 3 quarts? How many square yards are there in an acre?
All easy things to know when done in metric.
“Let me never fall into the vulgar mistake of dreaming that I am persecuted whenever I am contradicted.” ― Ralph Waldo Emerson