happens. Another law is that the total mass in a closed system is constant. Law 4: Conservation of Momentum A principle stating that the total linear momentum of an isolated system remains constant regardless of changes within the system. Law 5: Law of Thermodynamics Thermodynamics is the study of the inter-relation between heat, work and internal energy of a system. Law 6: Electrostatic Law Coulomb's law and Gauss's law are formulations of the relationship between electrically charged particles to create electrostatic force and electrostatic fields. Law 7: Invariance of the Speed of Light: Einstein's major insight, which led him to the Theory of Relativity, was the realization that the speed of light in a vacuum is constant and is not measured differently for observers in different inertial frames of reference, unlike all other forms of motion. Law 8: Modern Physics & Physical Laws: In the realm of relativity and quantum mechanics, scientists have found that these laws still apply, although their interpretation requires some refinement to be applied, resulting in fields such as quantum electronics and quantum gravity. ]