2. Questions Bank
  3. 9th Class
  4. Science
  5. Sound

9th Class Science Sound Question Bank 9th CBSE Science Sound

  • question_answer
      Write the name of the sound wave having a frequency of 40 kHz. Write one application of this type of sound.

    Answer:

       The sound wave having a frequency more than 20 kHz is called ultrasound. So, the sound having frequency of 40 kHz is ultrasound.                        Ultrasound can be used to detect cracks and flaws in metal blocks.


You need to login to perform this action.
You will be redirected in 3 sec spinner