What are substitutes that can replace copper and aluminum telephone cables?

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

C3h8o3 - glycerol major species present when dissolved in water

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?