What is meant by positive from Raoul's Law ? Give an example an example. What is the sing of `DeltaH_(mix)` for positive deviation ?

What is meant by positive deviation from Raoul's Law ? Give an example. What is the sign of DeltaH_(mix) for positive deviation ?

What is meant by positive deviation from Raoult's law? Given an example.

What is meant by positive deviations from Raoult's law and how is the sign of Delta_("mix")H related to positive deviation from Raoult's law ?

What is meant by simple harmonic oscillation ? Give example