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Speed of sound (#8803)

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"""
Title : Calculating the speed of sound
Description :
The speed of sound (c) is the speed that a sound wave travels
per unit time (m/s). During propagation, the sound wave propagates
through an elastic medium. Its SI unit is meter per second (m/s).
Only longitudinal waves can propagate in liquids and gas other then
solid where they also travel in transverse wave. The following Algo-
rithem calculates the speed of sound in fluid depanding on the bulk
module and the density of the fluid.
Equation for calculating speed od sound in fluid:
c_fluid = (K_s*p)**0.5
c_fluid: speed of sound in fluid
K_s: isentropic bulk modulus
p: density of fluid
Source : https://en.wikipedia.org/wiki/Speed_of_sound
"""
def speed_of_sound_in_a_fluid(density: float, bulk_modulus: float) -> float:
"""
This method calculates the speed of sound in fluid -
This is calculated from the other two provided values
Examples:
Example 1 --> Water 20°C: bulk_moduls= 2.15MPa, density=998kg/m³
Example 2 --> Murcery 20°: bulk_moduls= 28.5MPa, density=13600kg/m³
>>> speed_of_sound_in_a_fluid(bulk_modulus=2.15*10**9, density=998)
1467.7563207952705
>>> speed_of_sound_in_a_fluid(bulk_modulus=28.5*10**9, density=13600)
1447.614670861731
"""
if density <= 0:
raise ValueError("Impossible fluid density")
if bulk_modulus <= 0:
raise ValueError("Impossible bulk modulus")
return (bulk_modulus / density) ** 0.5
if __name__ == "__main__":
import doctest
doctest.testmod()