What materials can a arch bridge be made of?

If a reaction has g of -136kj at 110°c, will it be spontaneous at this temperature (110°c)? yes or no

When the earth was formed and cooled, why did nickel and iron end up in the center of the earth while basalt and granite ended up in the outer layers

Which form of relativism states that people rely on their own standards of right and wrong when making a decision?