updating DIRECTORY.md

Author: cclauss

DIRECTORY.md

@@ -1014,6 +1014,8 @@
   * [Coulombs Law](physics/coulombs_law.py)
   * [Doppler Frequency](physics/doppler_frequency.py)
   * [Escape Velocity](physics/escape_velocity.py)
+  * [Faraday Lenz Law](physics/faraday_lenz_law.py)
+  * [First Law Of Thermodynamics](physics/first_law_of_thermodynamics.py)
   * [Grahams Law](physics/grahams_law.py)
   * [Hamiltonian](physics/hamiltonian.py)
   * [Horizontal Projectile Motion](physics/horizontal_projectile_motion.py)
@@ -1023,6 +1025,7 @@
   * [Kinetic Energy](physics/kinetic_energy.py)
   * [Lens Formulae](physics/lens_formulae.py)
   * [Lorentz Transformation Four Vector](physics/lorentz_transformation_four_vector.py)
+  * [Magnetic Flux](physics/magnetic_flux.py)
   * [Malus Law](physics/malus_law.py)
   * [Mass Energy Equivalence](physics/mass_energy_equivalence.py)
   * [Maxwells Equations](physics/maxwells_equations.py)
@@ -1035,10 +1038,12 @@
   * [Photoelectric Effect](physics/photoelectric_effect.py)
   * [Potential Energy](physics/potential_energy.py)
   * [Rainfall Intensity](physics/rainfall_intensity.py)
+  * [Relativistic Kinetic Energy](physics/relativistic_kinetic_energy.py)
   * [Relativistic Velocity Summation](physics/relativistic_velocity_summation.py)
   * [Reynolds Number](physics/reynolds_number.py)
   * [Rms Speed Of Molecule](physics/rms_speed_of_molecule.py)
   * [Shear Stress](physics/shear_stress.py)
+  * [Snells Law](physics/snells_law.py)
   * [Speed Of Sound](physics/speed_of_sound.py)
   * [Speeds Of Gas Molecules](physics/speeds_of_gas_molecules.py)
   * [Terminal Velocity](physics/terminal_velocity.py)