Which Atom is being researched as a possible ingredientn of magnetic soap that can help clean up oil spills

An electromagnet is a device in which moving electric chargers in a coil of wire create a magnet.whats one advantage of using electromagnetic in devices

Properties seen when one one substance changes to another are known as properties

Suppose astronomers built a 140-meter telescope. how much greater would its light-collecting area be than that of the 10-meter keck telescope? express your answer using two sign