Understanding Rho (?) in Physics: The Density of a Substance

In physics, ρ (rho) is a symbol used to represent the density of a substance. It is defined as the mass of a substance per unit volume. In other words, it is the amount of mass that fits within a given volume.

For example, if you have a cube of water with sides of length 1 meter, and it has a mass of 1 kilogram, then the density of the water is:

ρ = m / V = 1 kg / (1 m)^3 = 1 kg/m^3

So, rho is a measure of how much mass is packed into a given volume. It is a fundamental concept in physics and is used to describe the properties of materials and substances.

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