You can invent any number of nonstandard units, but none of them is "best". It is best to use standard units, that is, the meter.
2/11
Using a non-standard scale. Science has generally agreed on a bunch of units grams, meters, joules etc to make up the "System International" or SI units. These should be used in a scientific context. They are based on Standards - for instance there used to be a stick in Paris which was defined as being a meter long all other meters had to be that length. They now use some trick with wavelengths of red light. Back on topic - There are other scales in general use mostly for historic reasons. The "customary units" in the US for distance (miles, yards, feet and inches) and weights (Pounds and Ounces) being pretty common examples. Using these scales could be considered nonstandard if you were writing a scientific paper. More likely nonstandard measure would be using a scale that is no ones standard. I could (and have) built a scaffold structure using units of "Rebecca" a nice girl who happens to be a good length to put scaffold floors apart. But I think you would have to consider her a nonstandard measure. The point being if you use nonstandard measure then people are not going to understand you since there is no common reference or "standard" to compare to.
standard or imperial measurements are in : inches, feet, yards, pounds, gallons and asuming by nonstandard you mean metric measurements, they are in, millimeters, meters, kilometers, kilograms, liters. .........TADA!
The standard unit of length is the meter, and any multiple and submultiple such as kilometer and millimeter. Nonstandard units include foot, inch, mile, light-year, parsec, astronomical unit.
You can invent any number of nonstandard units, but none of them is "best". It is best to use standard units, that is, the meter.
if you measure a crayon with inches is not the same as measuring with feet.
2/11
The foot, yard, mile, gallon, quart, pound and fluid ounce are examples of units of measurement in the United States customary units system. Examples of metric units of measurement include the meter, kilometer and gram.
If you mean how many countries have not officially completely changed to the SI units of measure there are 3. The United States, Liberia and Myanmar (Burma).
Standard units are common units that can be re-measured easily. Examples: meters, miles, grams, seconds, etc. Non standard units are more so things than units that can't be measured as easily. Example: 13 pieces of gum in length. Surely you could lay out 13 pieces of gum, but gum varies in size which makes it more difficult to use as an accurate measurement.
Using a non-standard scale. Science has generally agreed on a bunch of units grams, meters, joules etc to make up the "System International" or SI units. These should be used in a scientific context. They are based on Standards - for instance there used to be a stick in Paris which was defined as being a meter long all other meters had to be that length. They now use some trick with wavelengths of red light. Back on topic - There are other scales in general use mostly for historic reasons. The "customary units" in the US for distance (miles, yards, feet and inches) and weights (Pounds and Ounces) being pretty common examples. Using these scales could be considered nonstandard if you were writing a scientific paper. More likely nonstandard measure would be using a scale that is no ones standard. I could (and have) built a scaffold structure using units of "Rebecca" a nice girl who happens to be a good length to put scaffold floors apart. But I think you would have to consider her a nonstandard measure. The point being if you use nonstandard measure then people are not going to understand you since there is no common reference or "standard" to compare to.
idrk haha
Examples: kilogram, gram, ton, pound.
Milligrams, grams or kilograms are three examples.
standard or imperial measurements are in : inches, feet, yards, pounds, gallons and asuming by nonstandard you mean metric measurements, they are in, millimeters, meters, kilometers, kilograms, liters. .........TADA!
The standard unit of length is the meter, and any multiple and submultiple such as kilometer and millimeter. Nonstandard units include foot, inch, mile, light-year, parsec, astronomical unit.