Number density is number of objects per unit volume
===================================================

**Number density**, or **concentration**, is the number of particles per unit volume.
See :doc:`laws.quantities.quantity_is_volumetric_density_times_volume` for a more general law.

**Links:**

#. `Wikipedia <https://en.wikipedia.org/wiki/Number_density#Definition>`__.

.. py:currentmodule:: symplyphysics.definitions.number_density_is_number_of_objects_per_unit_volume

.. py:data:: number_density

    :attr:`~symplyphysics.symbols.basic.number_density` of particles.

Symbol:
    :code:`n`

Latex:
    :math:`n`

Dimension:
    :code:`1/volume`


.. py:data:: number_of_objects

    :attr:`~symplyphysics.symbols.basic.positive_number` of particles within the volume.

Symbol:
    :code:`N`

Latex:
    :math:`N`

Dimension:
    :code:`dimensionless`


.. py:data:: volume

    :attr:`~symplyphysics.symbols.classical_mechanics.volume` in which the particles are located.

Symbol:
    :code:`V`

Latex:
    :math:`V`

Dimension:
    :code:`volume`


.. py:data:: definition

    :code:`n = N / V`


    Latex:
        .. math::
            n = \frac{N}{V}