MEDIUM
9th CBSE
IMPORTANT
Earn 100

Give two practical applications of reflection of sound waves.

Important Questions on Sound

HARD
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 12 - Sound>Exercises>Q 13
A stone is dropped from the top of a tower 500 m high into a pond of water at the base of the tower. When is the splash heard at the top? Given, g=10 m s–2 and speed of sound =340 m s-1.
MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 12 - Sound>Exercises>Q 14
A sound wave travels at a speed of 339 m s–1. If its wavelength is 1.5 cm, what is the frequency of the wave? Will it be audible?
EASY
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 12 - Sound>Exercises>Q 15
What is reverberation? How can it be reduced?
EASY
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 12 - Sound>Exercises>Q 16
What is loudness of sound? What factors does it depend on?
EASY
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 12 - Sound>Exercises>Q 17
Explain how bats use ultrasound to catch a prey.
EASY
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 12 - Sound>Exercises>Q 18
How is ultrasound used for cleaning?
MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 12 - Sound>Exercises>Q 19
Explain the working and application of a sonar.
MEDIUM
9th CBSE
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS IX>Chapter 12 - Sound>Exercises>Q 20
A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m.