Question

1.(i) name two quantities that vary periidically at a place in air as a sound wave travels through it? (ii)which had larger frequency infrasonic sound or ultrasonic sound?? plzzzzzzz answer thia its urgent

Answer 1

1-A series of compressions (C) and rarefactions (R) vary periodically at a place in air as a sound wave travels through it.
2-Ultrasonic sound