define relative density and density of substance. give its units
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RELATIVE DENSITY
the ratio of the density of a substance to the density of a standard, usually water for a liquid or solid, and air for a gas
DENSITY OF A SUBSTANCE
The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume. The symbol most often used fordensity is ρ (the lower case Greek letter rho), although the Latin letter D can also be used.
the ratio of the density of a substance to the density of a standard, usually water for a liquid or solid, and air for a gas
DENSITY OF A SUBSTANCE
The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume. The symbol most often used fordensity is ρ (the lower case Greek letter rho), although the Latin letter D can also be used.
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it is ratio of density of substance to density of water.density is defined as the mass per unit volume.its unit are kg cm ^-3
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