There are several advantages. Some of them are:
1. They are internationally agreed as standard. Not like a gallon which can mean one amount in the US and another in the UK.
2. Orders of magnitude for the same measure are related by simple decimal conversions and only a handful of prefices are required (although there are a lot more if required). By way of contrast, the Imperial system uses:
and so on, and on and on. The decimal structure also makes it very simple to use scientific notation for small and large quantities.
3. It is used by most people in the world. The main recalcitrant countries are USA, Liberia and Myanmar. Even in the US, scientists normally use SI. When they don't they have disasters like the one that trashed NASA's Mars Climate Orbiter!
4. There are many simple relations from measures for one characteristics to another. For example, the SI unit of length is 1 metre. 100 square metres = 1 are, the unit for area. 1 cubic metre = 1000 litres, the unit for volume.
All conversions such as grams or meters, can be in units of 10.
Mainly that it is an international standard. Also, calculations are easier in the metric system, because of the multiples based on powers of 10.
As far as I am aware, the second (measure of time) is the only unit common to the English and metric system.
yes
1. It is an international standard, so everybody uses the same measurements. 2. Because it uses prefixes with powers of ten, conversions are much simpler. For example, to convert 7 kilometers to meters, you just add 3 zeroes.
Weight Watchers and EatSmart make really nice digital kitchen scales that measure in both. Most brands these days that are digital measure in both metric and US standard.
Mainly that it is an international standard. Also, calculations are easier in the metric system, because of the multiples based on powers of 10.
As far as I am aware, the second (measure of time) is the only unit common to the English and metric system.
There is no individual unit in the Metric system that is near one inch in the English system, I'm afraid.
yes
pounds=english grams=metric
An inch is such a measure.
-40oF = -40oC
The centigrade temperature scale in the Metric system was renamed in honour of Charles Celsius.
1. It is an international standard, so everybody uses the same measurements. 2. Because it uses prefixes with powers of ten, conversions are much simpler. For example, to convert 7 kilometers to meters, you just add 3 zeroes.
Newtons in Metric, and Pounds in the English System.
Force is measured in newtons.
Seconds, as a measure of time.