An elephant makes a call at 20 Hz. What is the wavelength of this sound? How does it compare to that of the blue whale making a similar call? Show your work.

8. why do radio telescopes convert radio waves (analog signals) to electrical (digital) signals for analysis? (hint: what did the article say about the advantages of digital signals? )

Aperson walks 7 feet east stops and walks 7 feet west

Wich factors affect the electrical force between two objects?