Question

1. A sonar pulse sent out by a boat arrives back after 3 seconds. If the speed of sound in water is 1500m/s, how deep is the water?

2. Draw a sketch of a wave, labelling the amplitude and wavelength.

Draw a second sketch of the wave with
a) a higher amplitude

b) greater wavelength
c) shorter pitch​

Answer 1

Answer:

2250 m

Explanation:

time taken by puse to arrive back 3 s

Distance =( speed * time)/2

= (1500*3)/2

= 2250 m

means 1.5 sec to go. After reflection from bottom arrive back take 1.5 sec.

Answer 2

Answer:

hello mate..

Explanation:

Velocity of sound in water v=1500 m/s

Let the depth of sea be x.

The sound has to travel to the bottom of the sea and get reflected back to the ship itself, thus total distance traveled by the sound is 2x.

Time taken to hear an echo t=1 s

So, 2x=vt

Or 2x=1500×1

⟹ x=750 m

hope you get your answer...

plz mark as brain list answer....................