What is necessary to produce any electromagnetic radiation?

a crystal

a vibrating charge

a magnet

a temperature of at least 300 degrees C

The summit of chimborazo, in ecuador, which is at a distance of about 6,384 km from the earth’s center. the bottom of the mariana trench, in the western pacific ocean, which is nearly 6,370 km from the center of the earth. on the surface of earth on the equator line.

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted

An ionic compound can conduct electricity when a it is dissolved in water b its crystals are ground into powder c it is in solid form d it is heated to just below its melting point