When sound is reflected from floor, ceiling or a wall, it mixes with the original sound and changess its complextion, it is called By crictensDecember 14, 2021Every Day Science A: Sound B: Echo C: Reverberation D: Noise Post navigation The magnet always points in the same direction, if allowed to move freely i.e towards North and South poles, becausse ofThe speed of sound in dry air at 20 is about Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment.