347573647362764325545467431765555167265492546254616531763 tonnes Acctually recent scientifical evidance suggests that dust particles have infinite mass One tenth the exact mass of a grain of sand.
It is due to wind blowing on the surface and also due to surface tension variation.
A small piece of matter. Depending on the context, it may be a grain of dust, or something much smaller, such as a molecule, an atom, or a subatomic particle.
I think so many societies depend on grain because grain was scarce
1 grain= 60 mg
10
A cloud of grain dust
The Grain of Dust - 1918 was released on: USA: February 1918
Grain of sand is bigger
275
Atoms
We don't need to weigh grains of dust in cooking measurements.
The Grain of Dust - 1928 was released on: USA: 10 July 1928 Finland: 16 December 1929 Portugal: 3 November 1930
1 Micrometer across
Many things can be smaller than a rock, such as a pebble, a grain of sand, or even a speck of dust.
A very very tiny scale
Concentrations of grain dust above certain limits were susceptible to burning rapidly if ignited. Dust control was also necessary to limit possible worker exposure to microorganisms, pesticide residues, toxins, insect parts