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. :)
Letter B
Tinawag sya na Little China at Greater India ang Timog Silangang Asya dahil sa impluwensiya ng Dalawang bansang India at China kultura ng mga bansa sa Asia.
Hope it helps po
