When sound waves travel from air to water,which of the following remains constant?

Write the equation for the speed of a sound wave according to Newton and explain the correction made by Laplace.

Ultrasonic,infrasonic,and audible waves travel through a medium with speeds $V_u$,$V_i$,and $V_a$ respectively. Then:

At what temperature does the velocity of sound in air increase by $10\%$ compared to its velocity at $0^{\circ}C$ (in $^{\circ}C$)?

Which of the following principles is being used in $SONAR$ technology?

The path difference between two particles of a sound wave is $50 \ cm$ and the phase difference between them is $1.8 \pi$. If the speed of sound in air is $340 \ ms^{-1}$,the frequency of the sound wave is (in $Hz$)