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kronos-venv/lib/python3.12/site-packages/sympy/physics/units/systems/mks.py

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+"""
+MKS unit system.
+
+MKS stands for "meter, kilogram, second".
+"""
+
+from sympy.physics.units import UnitSystem
+from sympy.physics.units.definitions import gravitational_constant, hertz, joule, newton, pascal, watt, speed_of_light, gram, kilogram, meter, second
+from sympy.physics.units.definitions.dimension_definitions import (
+    acceleration, action, energy, force, frequency, momentum,
+    power, pressure, velocity, length, mass, time)
+from sympy.physics.units.prefixes import PREFIXES, prefix_unit
+from sympy.physics.units.systems.length_weight_time import dimsys_length_weight_time
+
+dims = (velocity, acceleration, momentum, force, energy, power, pressure,
+        frequency, action)
+
+units = [meter, gram, second, joule, newton, watt, pascal, hertz]
+all_units = []
+
+# Prefixes of units like gram, joule, newton etc get added using `prefix_unit`
+# in the for loop, but the actual units have to be added manually.
+all_units.extend([gram, joule, newton, watt, pascal, hertz])
+
+for u in units:
+    all_units.extend(prefix_unit(u, PREFIXES))
+all_units.extend([gravitational_constant, speed_of_light])
+
+# unit system
+MKS = UnitSystem(base_units=(meter, kilogram, second), units=all_units, name="MKS", dimension_system=dimsys_length_weight_time, derived_units={
+    power: watt,
+    time: second,
+    pressure: pascal,
+    length: meter,
+    frequency: hertz,
+    mass: kilogram,
+    force: newton,
+    energy: joule,
+    velocity: meter/second,
+    acceleration: meter/(second**2),
+})
+
+
+__all__ = [
+    'MKS', 'units', 'all_units', 'dims',
+]