Difference between physical property and physical quantity?? Hi I'm confused after reading the definitions of physical Quantity and physical property: Definition from wikipedia: physical quantity= is a physical property of a phenomenon, body or substance that can be quantified by measurement. So A coin has physical properties like mass, density, which can be quantified by measurement. Does this mean that physical quantities and physical properties are the same thing, Is Lenght, time and mass quantities, or are they properties of objects? And if i were to list them would I list them under quantity or property? Wikepedeas definitions have confused me.