1.Es el tratamiento en el que el agua se pasa por una malla para separar ppr filtracion los materiales flotantes y particulas solidas en suspencion. 2.Es el proceso que consiste en provocar el agrupamiento de materia mediante agentes coagulantes

Which of the following statements is true? a. most heat energy is easily recovered and used for useful actions. b. friction causes molecules to vibrate more slowly. burning air and gasoline in an c. engine changes chemical energy into mechanical energy. it is impossible to d. change mechanical energy into mechanical energy.