Question

. _____________________ waves are used to send signals because they can travel over very long distances and pass through buildings

Answer 1

__________ waves are used to send signals because they can travel over very long distances and pass through buildings.

Step-by-step explanation:

Radio is your answer.

radio waves are used to send signals because they can travel over very long distances and pass through buildings.

Answer 2

the answer is electromagnet

Step-by-step explanation: