A submarine emits a sonar pulse, which returns from an underwater cliff in 1.02 s. If the speed of sound in salt water is 1531 m/s, how far away is the cliff?
Explain the working and application of a sonar.
How is ultrasound used for cleaning?
Explain how defects in a metal block can be detected using ultrasound.
Give two practical applications of reflection of sound waves.
Give one use of ultrasound in industry and one in hospitals.
What is sonar ? Explain its use.
Explain how bats use ultrasound to catch a prey.
