Question

I want at least 5 HOTS que of chapter sound of class 9 cbse

Answer 1

1. Difference b/w noise and musical sound.
2.Difference b/w wave of noise and music.
3.What is pitch?How it is differ from the voice of a woman and the voice of a man.
4. Define larynx.
5.Which is the best medium to pass the sound?

Answer 2

Question.1 What is SONAR?
Answer. SONAR (Sound Navigation And Ranging) is a technique for determining water depth and locating underwater objects, such as reefs, submarines, and schools of fish.

Question.2 Define one hertz.
Answer. One hertz is one vibration per second.



Question.3 Define wavelength.
Answer. It is the distance between two nearest points in a wave which are in the same phase of vibration.

Question.4 Suppose you and your friend are on the moon. Will you be able to hear any sound produced by your friend?
Answer. No, I will not be able to hear sound, because moon has no atmosphere. Therefore, no sound waves can travel to your ears and, therefore, no sound is heard.

Question.5 Guess which sound has a higher pitch; guitar or car horn ?
Answer. Car horn has a higher pitch than a guitar, because sound produced by the former is shriller than the latter.

Question.6 How are the wavelength and frequency of a sound wave related to its speed?
Answer. Speed of sound = Frequency x Wavelength.