Question

what is difference between mass and density and why we measure weight in kg why not in newton

Answer 1

Mass quantifies the amount of matter present in a certain object that is usually expressed in unit grams or kilograms. ... Density quantifies how much mass is present in a certain matter or object with respect to volume (per unit volume). Water, for example, has a density of 1 gm/cm3.Oct 11, 2011Yes. When we use kilograms tomeasure weight, we are actually referring to k g f or kilogram-force. From Wikipedia: One kilogram-force isequal to the magnitude of the force exerted by one kilogram of mass in a 9.80665 m/s2 gravitational field. In other words, the weight(force) of onekg is equal to one kgf, or 9.8N.