What is the difference between quantum mechanics and classical mechanics?

Question

Accepted Answer

Quantum mechanics and classical mechanics differ in their principles, scale, and behavior of particles.

Quantum mechanics describes the behavior of particles at the atomic and subatomic level, while classical mechanics deals with macroscopic objects.
Quantum mechanics incorporates the concept of wave-particle duality, where particles can exhibit both wave-like and particle-like properties.
Classical mechanics follows deterministic laws, while quantum mechanics introduces probabilistic behavior.
Quantum mechanics allows for phenomena such as superposition and entanglement, which have no classical analogues.
An example of the difference is the behavior of electrons in an atom, which is described by quantum mechanics, compared to the motion of a baseball, which is described by classical mechanics.