Which of the following properties of matter can be explained on a submicroscopic level?

Question 7 options:

Structure

Composition

Behavior

All the above

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here