Sound travels at the fastest speed in ________.
AVacuum
BSteel
CWater
DAir
Answer:
B. Steel
Read Explanation:
Sound waves are mechanical waves, that is, they require material medium to travel. It is the movement of the medium that transmits the wave. Since the density of solids is high and the molecules of a solid are closely packed, sound waves are quickly transmitted from one molecule to the next thus enabling it to travel faster. The speed of sound, therefore, is fastest in solids, followed by liquids (less dense than solids) and then gas (least dense). Since steel is a solid substance, so sound travels fastest in it. Sound cannot travel in a vacuum as there is no material medium.