Excess pressure under curved surface of bubble
==============================================

Under the curved surface of the liquid, in addition to the internal pressure, additional
pressure is created due to the curvature of the surface. For a bubble, this pressure is
created by two surfaces: the outer and the inner.

**Links:**

#. `Physics LibreTexts, formula 20.2.4 <https://phys.libretexts.org/Bookshelves/Classical_Mechanics/Classical_Mechanics_(Tatum)/20%3A_Miscellaneous/20.02%3A_Surface_Tension/20.2.01%3A_Excess_Pressure_Inside_Drops_and_Bubbles>`__.

..
    TODO: fix file name

.. py:currentmodule:: symplyphysics.laws.hydro.excessive_pressure_under_curved_surface_of_bubble

.. py:data:: pressure_difference

    :attr:`~symplyphysics.symbols.classical_mechanics.pressure` difference between the surfaces of the bubble.

Symbol:
    :code:`Delta(p)`

Latex:
    :math:`\Delta p`

Dimension:
    :code:`pressure`


.. py:data:: surface_tension

    :attr:`~symplyphysics.symbols.classical_mechanics.surface_tension` of the bubble.

Symbol:
    :code:`gamma`

Latex:
    :math:`\gamma`

Dimension:
    :code:`force/length`


.. py:data:: radius

    :attr:`~symplyphysics.symbols.classical_mechanics.radius` of the bubble.

Symbol:
    :code:`r`

Latex:
    :math:`r`

Dimension:
    :code:`length`


.. py:data:: law

    :code:`Delta(p) = 4 * gamma / r`


    Latex:
        .. math::
            \Delta p = \frac{4 \gamma}{r}