Physics for IGCSE & O level - Waves And Sounds (Section 7 - No. 34)
In echo-sounding, what is the significance of the time taken for the ultrasound pulse to return?
It directly relates to the speed of sound.
It indicates the material composition of the seabed.
It is directly proportional to the depth of the water.
It is inversely proportional to the depth of the water.
คำอธิบาย
The longer the time, the deeper the water