How matter changes phase from liquid to gas.
How matter changes phase from liquid to solid.
Understanding the behavior of an object in free fall.
How to understand the idea of slope.
Understanding the process of evaporation.
Understanding the process of condensation.
How to find the speed of transit when the time of two different legs is known.
How to find the general term of a geometric sequence.
How to compute the average velocity of an object moving in one dimension.