If the sound speed in the air at a speed that is 30° 1 where 0° is the speed in which the sound velocity in water 2, and a 3 speed rate. Chong, sort of sound speed from high to low.
If speed is the speed of sound in air at 30 ° to 0 ° at a speed of 1 second. And the speed of sound in water at a speed of three. Rank the speed of sound descending.
If the velocity of sound in the air 30 ° rate fast 1 that 0 ° rate faster and water as soon as the second ความเร็วเสียงใน 3. The speed of sound, in order from highest to lowest.