Exam Preparation Tips

Density

The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume. The symbol most often used for density is ρ (the lower case Greek letter rho).

Mathematically, density is defined as mass divided by

where ρ is the density, m is the mass, and V is the volume. In some cases (for instance, in the United States oil and gas industry), density is loosely defined as its weight per unit volume,although this is scientifically inaccurate – this quantity is more properly called specific weight. 

Visit http://www.studyadda.com/videos/ix-class-physics-lectures/floatation/density/1744

All the video lectures at StudyAdda are exclusively developed and taught by Mr. Lalit Sardana(IIT-JEE,AIR 243) and Mrs. Shweta Sardana(AIPMT Trainer, MSc., MPhil (Gold Medalist)), Sardana Tutorials).