Bhumi Srivastava

Asked: October 28, 2020In: Class 9

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.

NCERT Solutions for Class 9 Science Chapter 12 Important NCERT Questions Sound NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-175 Questions No-20

Bhumi Srivastava

Asked: October 28, 2020In: Class 9

Explain how defects in a metal block can be detected using ultrasound.

NCERT Solutions for Class 9 Science Chapter 12 Important NCERT Questions Sound NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-175 Questions No-21

Bhumi Srivastava

Asked: October 28, 2020In: Class 9

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.

NCERT Solutions for Class 9 Science Chapter 12 Important NCERT Questions Sound NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-174 Questions No-13

Bhumi Srivastava

Asked: October 28, 2020In: Class 9

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?

NCERT Solutions for Class 9 Science Chapter 12 Important NCERT Questions Sound NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-174 Questions No-14

Bhumi Srivastava

Asked: October 28, 2020In: Class 9

What is reverberation? How can it be reduced?

NCERT Solutions for Class 9 Science Chapter 12 Important NCERT Questions Sound NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-175 Questions No-15

Bhumi Srivastava

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.

Explain how defects in a metal block can be detected using ultrasound.

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.

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?

What is reverberation? How can it be reduced?

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