Sound travels fastest through solids and slowest through gases such as air. In assessments, the speed of sound through any material will be given in the question, if required.

The researchers say the "hack" works because sound travels faster in warmer water. The team looked at sonic data from the Indian Ocean emitted by tremors over a 10-year period. As the seas have ...

at sea level sound travels at around 760mph, (so, at sea level Mach 1 is around 760 mph) as you get higher the air gets thinner and sound is slower. Let’s meet the 10 fastest planes… ...