Q: which material would be best to use for the handle of a pot for cooking, copper or carbon? which material would be best to use at the bottom of the pot? ( answer and explain)

Carbon as pan because although copper is a good insulator, it can release a metallic taste into your food and you may eat copper which isn't good if your using it daily.
So carbon pan copper handle

If the water vapor content stays the same and the temperature drops, then the relative humidity increases. its vise versa.if the water vapor content stats the same and the temperature rises, the relative humidity decreases. so, yes, i'd say that temperature and humidity have a strong relationship.

Idont know. if you want an answer you need to give us some context dude.