When wax is heated then the molecules of wax starts to move due to increase in temperature. As a result, force of attraction between the molecules will decrease and they will start to move from one place to another.
Due to heating, the wax molecules will start moving randomly. Hence, wax will convert into liquid state.
When it was solid, its molecules and atoms stuck in place and could not be moved, which is why it was a solid object. Now that it's a liquid, it's atoms and molecules are free flowing and a constantly move adapting to the environment or the container.
Answer:Rate of change of Velocity per unit time” & definition of Velocity is “Rate of change of Distance per unit Time”. It means that , when acceleration is 0 then , velocity is constant. In short whatever may be the Velocity, if it remains constant then we say that acceleration is zero.
