This is for harrypotterfan62 (Aka Cho)

You find a mysterious, dull substance on the ground and pick it up for a closer look. it is powdery, very light, and soft to the touch. the substance is most likely i. an organic mineral ii. a metallic mineral iii. a nonmetallic mineral i only ii only iii only i and ii i and iii

How much hazardous chemical waste is produced per year in the us?

Technician a says most shops use a spray wash cabinet to degrease their engine blocks. technician b says some shops dip their major engine parts in a hot or cold caustic solution for deeper cleaning. who is correct?