What is Particle size (general)?
The term '''particle size''' is used to compare [[dimension]]s of different small [[material]] [[object]]s. Larger objects are usually called [[stone]], [[Rock (geology)|rock]], a piece of something, etc. The term ''particle'' indicates small size, usually less than [[centimeter]]. Particle might be either [[solid]], or [[liquid]], or even [[gas]]. Liquid particles are called ''droplets''. Gaseous particles are ''bubbles''. All of them can be characterised in terms of size. *Particle size of [[sphere|spherical]] object equals to its [[diameter]]. But a typical material object is likely to be irregular in [[shape]]. This causes [[ambiguity]] in definition of ''particle size''. Existing definitions are based on replacent of a given particle with imaginary [[sphere]] that has one of the properties identical with the particle. *'''Volume based particle size''' equals to the diameter of the sphere that has same volume as a given particle; *'''Weight based particle size''' equals to the diameter of the sphere that has same weight as a given particle; *'''Area based particle size''' equals to the diameter of the sphere that has the same [[surface]] area as a given particle; *'''Hydrodynamic particle size''' equals to the diameter of the sphere that has the same [[drag]] coefficient as a given particle; ==Related pages== * [[Particle size (grain size)]] [[Category:Chemistry]] {{chem-stub}}