Question

arrange the following sound waves according to speed from the slowest to the fastest: The sound waves in steel,The sound waves in cold air, The sound waves in water, and The sound waves in hot air.

Answer 1

The basic concept that needs to be understood is that sound travels faster through a dense medium. Now if we check the options given in the question, then they should be arranged in the manner given below. 
1. The sound waves in hot air. 
2. The sound waves in cold air.
3. The sound waves in water.
4. The sound waves in steel.