Advertisements
Advertisements
Question
Describe a simple method to find the depth of a submerged ship.
Advertisements
Solution
A ship sends ultrasonic waves downward in the ocean. When the sound waves reaches the ocean floor , they are reflected back to the ship . The time it takes for the signal to return is used to calculate the depth of submerged ship in the ocean.
APPEARS IN
RELATED QUESTIONS
A microphone is connected to the Y-input of a C.R.O Three different sounds are made in turn in front of the microphone. Their traces (a), (b) and (c) produces on the screen are shown in following figure.
![]() |
![]() |
![]() |
| (a) | (b) | (c) |
- Which trace is due to the loudest sound? Give reason for your answer.
- Which trace is due for the sound with the lowest pitch? Explain your answer.
Complete the following sentence:
Ultrasound is of frequency ___________.
Complete the following sentence:
Bats can produce and hear ___________ sound.
Name the sound of the frequency given below:
1000 Hz
Name three animals which can hear ultrasonic vibrations.
How do bats locate their prey during a flight?
What is Galton’s whistle? To what use is it put?
What are hearing aids?
State the properties of ultrasound that make it useful.
Ultrasound has frequency of vibration



