Mass is constant

The mass is constant in a system that is closed, and mass is not transformed to energy.

Conditions:

1. System in a closed impenetrable volume, that is, molecules/atoms cannot leave it and they are always inside.

2. Mass is not transformed to energy, for example due to annihilation.

Note:

1. SymPy does not have a proper way to represent constant mass. We use it’s derivative over time instead. Derivative of the constant value is zero.

Links:

1. Wikipedia.

time

time.

Symbol:

t

Latex:

\(t\)

Dimension:

time

mass

mass as a function of time.

Symbol:

m(t)

Latex:

\(m{\left(t \right)}\)

Dimension:

mass

law

Derivative(m(t), t) = 0

Latex:

\[\frac{d}{d t} m{\left(t \right)} = 0\]