Question

law of conservation of mass ??​

Answer 1

Answer:

In physics and chemistry, the law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed.

Answer 2

The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction.

Formula

\frac{\partial\rho}{\partial t}+\nabla \cdot (\rho v)=0

\rho = density

t = time

\nabla = divergence

v = flow velocity field