Zaymiey

⚛️ Physics  ·  Units and Measurements  ·  NEET & JEE

A mass of 5.74 g occupies a volume of 1.2 cm³. The density reported with correct significant figures is:

Answer: 4.8 g/cm³.

  • A 4.783 g/cm³
  • B 4.8 g/cm³
  • C 4.78 g/cm³
  • D 5.0 g/cm³

Correct answer: B. 4.8 g/cm³

Explanation: 5.74/1.2 = 4.783..., but the least precise value (1.2) has 2 significant figures, so density = 4.8 g/cm³.

The 7 SI Base UnitsLengthmetre (m)fundamentalMasskilogram (kg)Timesecond (s)Electric Currentampere (A)Temperaturekelvin (K)Amount ofSubstancemole (mol)LuminousIntensitycandela (cd)Every other physical quantity is derived by combining powers of these 7 base units

The 7 SI base units. All derived units (newton, joule, watt, volt, etc.) can be expressed as combinations of these 7 fundamental units raised to various powers.

Concept context

SI base units, dimensional analysis, significant figures, and error propagation. The toolkit every physics calculation relies on.

Read the full Units and Measurements notes →