Why do we use copper for iphone chargers

Indicate whether the specified alkyl halides will form primarily substitution products, only elimination products, both substitution and elimination products, or no products when they react with sodium methoxide. 1-bromobutane 1-bromo-2-methylpropane 2-bromobutane 2-bromo-2-methylpropane

Which type of fossil does this image depict?

What is the main reason why some developing countries fear the increase the free trade policies around the world?