Select the values fir the coefficients that will balance the equation. whats the answer for x, y, and z

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

Connect the whole numbers on the periodic table to indicate what they represent?

Answer asap : ( a. how does mucus prevent the entry of pathogens? b. describe two ways white blood cells protect us from pathogens.