Density of a substance is the ratio of its mass and volume. Since mass has typical units of gram or kilogram and volume is generally given units or ml, liter, cm^3, etc.; the units of density are (generally) gm/cm^3, kg/lt or kg/m^3, etc. Water is the most commonly known liquid known to mankind. It has a density of 1 g/cm^3. The units can also be expressed as `gcm^(-3)` instead of `g/(cm^3)` . Mathematically, the term in...
Density of a substance is the ratio of its mass and volume. Since mass has typical units of gram or kilogram and volume is generally given units or ml, liter, cm^3, etc.; the units of density are (generally) gm/cm^3, kg/lt or kg/m^3, etc. Water is the most commonly known liquid known to mankind. It has a density of 1 g/cm^3. The units can also be expressed as `gcm^(-3)` instead of `g/(cm^3)` . Mathematically, the term in the denominator can be written as a term in numerator with a power of -1. In other words, a/b can also be written as a.b^(-1). The same terminology has been used here. The -3 that you see in your question paper is actually the power of 'cm' and that is the reason it is a bit smaller.
Hope this helps.
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