A minerals processing plant uses a conveyor belt and an electromagnet to separate magnetic iron ore (magnetite) from non-magnetic quartz sand.
Explain how the electromagnet and conveyor belt are used to separate the magnetite from the quartz sand.
Describe two ways to increase the strength of the magnetic field produced by the electromagnet.
Write down the equation that links distance travelled (sss), speed (vvv), and time (ttt).
The conveyor belt moves at a speed of 1.4 m/s1.4 \text{ m/s}1.4 m/s. Calculate the time taken for a grain of magnetite to travel a distance of 4.5 m4.5 \text{ m}4.5 m. Give your answer to 2 significant figures.