Name the Principle Used to Find the Depth of a Sea. - Physics

Name the principle used to find the depth of a sea.

One Line Answer

The depth of a sea can be found by the process of 'echo depth sounding'. This process is based on the principle of 'echo formation'.

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Chapter 3 Sound
Exercise 3.1 ii | Q 15 | Page 136

The frequency of a source of sound is 100 Hz. How many times does it vibrate in a minute?

What is loudness of sound? What factors does it depend on?

Select the correct alternative :

We can hear sound of frequency

You recognize your friend by hearing his voice on a telephone. Explain.

The sound of an explosion on the surface of a lake is heard by a boat man 100 m away and by a diver 100 m below the point of explosion.

(i) Who would hear the sound first: boatman or diver?

(ii) Give a reason for your answer in part (i).

(iii) If sound takes time t to reach the boatman, how much time approximately does it take to reach the diver?

Select the correct option:

If the frequency of a wave is 25 Hz. the total number of compressions and rarefactions passing through a point in 1 second is :

The distance between three consecutive crests of wave is 60 cm. If the waves are produced at the rate of 180/ min, calculate:

How does the speed of sound depend on (i) Amplitude, and (ii) Wavelength?

Sound waves travel very fast in