6. State one use of thermal expansion. 7. State two factors that affect melting point of a substance, Physcs pa (1 mark (2 mark S. A body is projected vertically upwards from the top of a building. If it lands on the base of the buldi Sketch the velocity-time graph for motion 9. State a reason why transfer by radiation is faster than by conduction 10. The pulley system in the figure below supports a load of SON (2 mark (1 mark Effort, E 50N​