Aforce of 29.0 n is used to lift a baby through a distance of .500 m. how much work is done to the baby?

Ineed to answer this problem but i lack in knowledge, what should i study to answer this problem? i have never used derivatives in a physics problem so i'm not sure what's happening and i can't find videos explaining.

You have 80 g of 60oc water and 80 g or 10oc water. what is the final temperature when the two are mixed? explain.

The buildup of charges on an object is called