The meteorological visibility in fog is defined as the distance that gives an optical thickness of 4. if a typical fog has a mass density of 103 kg water per cubic metre and gives a visibility of 100 m, estimate the size of the water droplets.

What is the term for a government where power is carefully divided between a central government and several regional or provincial governments? a.) unified or central government b.) federal government c.) confederate government d.) republican government