Answer:
Iron ore, coke and lime stone are some raw materials used for extracting iron.
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The sand provides a rough surface on top of the ice for the cars' tires to grip onto. It provides more friction. Salt melts the ice and often provides more friction (the disadvantage is that it eats concrete!).
1 foot = 30.48 cm
3.5 ft * 30.48 cm = 106.68 cm
Answer = 106.68 cm
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Now in total the ion has 27 electrons, 30 protons and 35 neutrons