The density of a substance is defined as _____.

This question was previously asked in
RRC Group D Previous Paper 48 (Held On: 11 Dec 2018 Shift 2)
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  1. Mass per unit volume
  2. Product of mass and acceleration
  3. Weight per unit volume
  4. Thrust unit area

Answer (Detailed Solution Below)

Option 1 : Mass per unit volume
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Detailed Solution

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The correct answer is Mass per unit volume.

  • Density is an important physical property for characterizing a material or chemical system.
  • Mathematically, density is calculated as a substance's mass per the volume it occupies.
  •  The formula for density is d = M/V, where d is density, M is mass, and V is volume.
    • Density is commonly expressed in units of grams per cubic centimetre (g/cm3).

Key Points

  • Water achieves its maximum density at 4ºC (39.2ºF).
  • The natural density of milk is 1.200 times greater than normal water at 4ºC, i.e. the standard density of water 1 gm/cc.
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