Meters
Units of measurement provide a standard to measure mass, length etc.So, it is useful.
meter
Hmm, it's not a yoctometer, it's actually a planck length, that's apparently the size of quantam foam. However, calling the planck length a 'measurement' is a little misleading since we have no means whatever of actually measuring things that small and we may never have. It is useful currently only in theoretical work. See the discussion and modify your question if necessary.
because it is.
the standard unit is meter, but centimeter, millimeter or kilometer are also useful.
The best units would be millimetres for the length measurements and millilitres for the volume.
Units of measurement provide a standard to measure mass, length etc.So, it is useful.
meter
It is by the meter
Hmm, it's not a yoctometer, it's actually a planck length, that's apparently the size of quantam foam. However, calling the planck length a 'measurement' is a little misleading since we have no means whatever of actually measuring things that small and we may never have. It is useful currently only in theoretical work. See the discussion and modify your question if necessary.
They are in fact two different devices that are commonly mistaken. A "measuring stick" is a stick of a given length that is used to reference another object from it's total length. These usually have no markings as such, or any calibrated length. A "ruler" (aka straightedge) IS calibrated and has measurement markings. It is used to "rule" straight lines to an exacting measurement. Originally designed for the engineering industry, they have been useful in countless other areas throught history. A 2 second google search revealed this: http://en.wikipedia.org/wiki/Ruler
Tape measures are useful for measuring distances that are too large to measure with your ruler.
You have it in reverse. Scientific notation is useful for measuring stars.
No. I would use linear units if measuring the swim distance or cubic units if measuring the volume of water. Square units might be useful to see how many people could use the pool before it got crowded but that would depend on whether they were there for swimming or splashing about.
It turns out that the Breslow measurement is more reproducible and thus more useful; therefore, for purposes here, depth of penetration by absolute measurement (Breslow) is used in local staging.
small measurements That depends on what you are measuring. For mass, you may want to use an analytical balance. For volume, a buret or Eppendorf pipette would be useful. Like I said before, it is highly dependent on what your measuring and what the point of the measurement is.
they are useful for swimming