Discuss the dual nature of electromagnetic waves and how they travel in a vacuum and through a medium.

Which is not a source of noise pollution? a)airplanes b)acid rain c)machines d)cars

The sun generates both mechanical and electromagnetic waves. which statement about those wave is true?

Consider two metallic rods mounted on insulated supports. one is neutral, the other positively charged. you bring the two rods close to each, but without contact, and briefly ground the the neutral rod by touching it with your hand. show answer correct answer what would be resulting charge (if any) on the initially neutral rod