A pedestrian moves 2.5 km east and then 3.6 km north.
Find the magnitude of the resultant dis-
placement vector.
Answer in units of km.

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

The correct answer should be b let me know if i’m wrong

Answer (d) the universe had cooled enough for atoms to combine, protons and neutrons were too far apart to form nuclei;

Answer(b) both involve the use of levers;