Iron nail. the rest of those are not iron or some form of magnetic material.
Answer:
ix chemical elements that comprise Group 2 of the periodic table
Explanation:
Calcium, Magnesium, Barium, Beryllium, Strontium, and Radium are alkaline earth metals.
A sound wave traveling eastward through air<span> causes the air molecules to Vibrate east and west. </span>
By adding a vibration at the natural frequency of the medium-A
This is a binary star system