A person runs a complete lap around a track (400 m) in 2.5 mins. Her starting position is exactly the same as her ending position. What is her displacement?

The radiation of the fire causes the saucepan to heat up. the conduction of the saucepan then to distribute the heat over the saucepan and to give heat to the water. the convection of the water distributing the heat within the water, till all the water is boiling

Is this a question of an answer