...warmer...? ... it is less dense, and i've been taught that the less dense the material the slower the sound travelling through it?
( air is less dense than water; sound travels 5 times more slowly through air than through water; water is less dense than steel; sound travels 4 times more slowly through water than through steel)
( air is less dense than water; sound travels 5 times more slowly through air than through water; water is less dense than steel; sound travels 4 times more slowly through water than through steel)