Why do seeds need to be dispersed?

A body in uniform motion covers a distance of $200 \mathrm{m}$ in $10 \mathrm{s}$. Calculate the speed of the body.

Joseph was heating milk in a stainless steel vessel and a copper bottom vessel. In which vessel is the milk likely to boil faster and why?

You are at home one evening when a thunderstorm strikes. List three things you should do to keep yourself safe during the storm.