au
Not sure whether it is in any way more "useful", but a common unit of measurement for distances within the Solar System is the AU.SI units, especially meters and kilometers, are also used, though.
The unit of measurement most useful for a baseball's weight is ounces.
penis
The azimuthal projection is most useful for showing distances between two points on the Earth. This type of map projection represents the globe on a flat surface by projecting it from a specific point, allowing for accurate measurement of distances from that point to any other point on the map. However, for more comprehensive distance measurements across larger areas, the great circle distance method can be used in conjunction with a globe.
A measurement conversion calculator enables the user to switch from various international units of measurement. The most useful features for such a calculator would include a wide variety of units that can be converted, accuracy, and ease of use.
The most common measurement for weight is kilograms (kg). That is the metric S.I. (systéme internationale d'unites) unit for weight.
Most distances, sizes, and shapes are accurate
most distances, sizes and shapes are accurate
Meters
most distances, sizes and shapes are accurate
most distances, sizes and shapes are accurate
Milligrams. 1/1000th of a gram.