What are the categories of sound waves based on their frequencies?

How will you determine the velocity of sound by echo method?

Write the difference between the sound and light waves.

Explain the working and use of SONAR?

What are the various possibilities of relative motion between source and listener?

What are the factors that affect the speed of sound in gases?

What is mean by reflection of sound? Explain:
a) reflection at the boundary of a rarer medium
b) reflection at the boundary of a denser medium
c) Reflection at curved surfaces

Suppose that a sound wave and a light wave have the same frequency, then which one has a longer wavelength?
a) Sound
b) Light
c) both a and b
d) data not sufficient.

Find the speed of sound in air at 9.23° C.

At 10° C, how for away is a reflecting surface if you hear an echo in 0.274s?