Millimetre.
You can measure and express any length or distance, no matter how large or small,in terms of kilometers. But when it comes time to write the measurement down,remember it, work with it, or tell others about it, it's often more convenient ...especially when 'kilometer' results in a very small or a very large number ... to convertthe measurement to a smaller unit, such as the nanometer, or a larger unit, such asthe light year.
inches because there small enough
DNA And RNA
That depends exactly how small it is. Centimeters are for smaller things.
You can use the kilometer to measure small distances, but it is inconvenient to do so. A kilometer is a unit of measurement for a large distance. It is more accurate and practical to measure small distances using smaller units like the meter or centimeter.
The answer will depend on what aspect of the calculator you wish to measure: its length, volume, mass, weight, temperature, etc.
Please clarify what you want to measure - its length, mass, color, volume, etc.
Feet if it is a large snake or Inches if it is realtively small.
The answer will depend on what attribute of the hammer: its mass, weight, length, etc you wanted to measure.
I would say centimeters, not inches
You can measure and express any length or distance, no matter how large or small,in terms of kilometers. But when it comes time to write the measurement down,remember it, work with it, or tell others about it, it's often more convenient ...especially when 'kilometer' results in a very small or a very large number ... to convertthe measurement to a smaller unit, such as the nanometer, or a larger unit, such asthe light year.
inches because there small enough
The unit of measurement "m" can refer to several things, depending on context. A small "m" typically refers to a meter, which is a unit of length. A capital "M" typically refers to a nautical mile, which is a unit of length at sea. A small "m" may also refer to a mile. Although out of context, a mile is more often expressed as "mi".
DNA And RNA
You can measure small lengths in millimeters. Length of a pencil, pen, eraser, length and width of a paper, sheet etc. can be measured in millimeters.
a mm is a tenth of a cm. This makes it a thousanth of a metre. It is a small and precise unit of measurement.
There is no "unit of measurement for a plastic block". The SI has units of length, area, volume, mass, tensile strength, etc.; please clarify what aspect of the plastic block you want to measure.