A sound wave is travelling from a metallic rod to water. What changes will occur in the velocity and frequency of the sound ?

Explanation

As the sound is produced by a vibrating source, the number of vibrations completed by that source in 1 s remains same, i.e., the frequency of sound wave remains constant even though it travels from one medium to another. Sound travels with different speeds in different media. As it is entering from solid (metalic rod) to water (liquid), its velocity (speed) decreases.