When recyclable materials are sent to a recycling plant, they are often not sorted in any particular way. Plastic materials might be
mixed in with paper, iron, aluminum, and glass materials
Image courtesy of the U. S. EPA
Which of the following is a way that recycling plants separate iron materials from other materials without applying a contact force
to them?
A. by applying an impact force to the recycled materials
B. by sorting the materials with a robotic arm
C. by applying a magnetic force to the recycled materials
D. by sorting the materials by hand