Question

a sample of solid iron and sand can be most easily separated using a ______. bare hand magnet piece of tape

Explanation:

Iron is magnetic, while sand is not. A magnet can attract the iron particles, separating them from the non - magnetic sand. A bare hand would be inefficient for separating small particles of iron and sand. A piece of tape is not a practical tool for this separation as it does not have a property that selectively interacts with iron over sand.

Answer:

magnet