No answer choices provided but it’s because income is how much you are making before tax. Also, wealth means an abundance of currency so unless you are making lots of money, you dont have wealth. Hope this helps.
P represents heating and Q represent cooling.
this is because when you start from a liquid and turn to a gas the particles move faster making them farther apart, causing a gas. the opposite happens when you go from a liquid to a solid. the partials move closer together causing a solid to form. :)
Focus and make sure you understand even if it takes a while to get it keep it refreshed in ur head just stay on topic