Which sound wave is of more pitch?

Refer to the graph given here. Which of the following sound waves is low-pitched but loud?

The figure given below shows the images of sound waves. Look at them and answer the following questions Which represents the sound with the lowest pitch?

Of the following, the one which emits sound of higher pitch is :

The frequencies of four sound waves are given below. Which of these sound waves can be used to measure the depth of sea by the echo method?

The sound wave require more reflecting surface than the light wave because of

What is the evidence in support of the fact that (a) sound is a wave (b) sound is a mechanical wave (c) sound waves are longitudinal.