The loudness of a sound is inversely proportional to the square of your distance from the source of the sound. if your friend is right next to the speakers at a loud concert and you are four times as far away from the speakers, how does the loudness of the music at your position compare to the loudness at your friend's position?

Loudness at our position is 1/16 times smaller than the loudness at your friend position

Explanation:

As we know that the loudness decreases as we move away from the speaker

and the loudness is inversely depending on the square of the distance from the speaker

So here we know

so here we can compare two loudness at two different positions

here we know that

now we know that

sonar - device which is used to find the submit submarines, sankalp ship. sonar waves consists of a transmitter and detector which are installed in the observation centre on board of a ship. the ultrasonic waves are sent into the sea at high frequency about 1000 khz in all direction.

it about 600 mph from what i calculated