Can some one please help me

Which subatomic particle has a negative charge

(1 point) match the differential equations and their vector valued function solutions. you may wish to multiply at least one solution out fully, to make sure that you know how to do it. you can get the other answers quickly by process of elimination and just multiply out one row element.

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.