NCERT Solutions Class 9 Maths Chapter 12 Sound – Here are all the NCERT solutions for Class 9 Maths Chapter 12. This solution contains questions, answers, images, explanations of the complete Chapter 12 titled The Fun They Had of Maths taught in class 9. If you are a student of class 9 who is using NCERT Textbook to study Maths, then you must come across Chapter 12 Sound. After you have studied lesson, you must be looking for answers of its questions. Here you can get complete NCERT Solutions for Class 9 Maths Chapter 12 Sound in one place.
NCERT Solutions Class 9 Science Chapter 12 Sound
Here on AglaSem Schools, you can access to NCERT Book Solutions in free pdf for Science for Class 9 so that you can refer them as and when required. The NCERT Solutions to the questions after every unit of NCERT textbooks aimed at helping students solving difficult questions.
For a better understanding of this chapter, you should also see summary of Chapter 12 Sound , Science, Class 9.
NCERT Solutions Class 9 Science chapter 12 Sound
Class 9, Science chapter 12, Sound solutions are given below in PDF format. You can view them online or download PDF file for future use.
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Download NCERT Solutions Class 9 Science chapter 12 Sound In PDF Format
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Question & Answer
Q.1: How does the sound produced by a vibrating object in a medium reach your ear?
Ans : When an object vibrates, it forces the neighbouring particles of the medium to vibrate. These vibrating particles then force the particles adjacent to them to vibrate. In this way, vibrations produced by an object are transferred from one particle to another till it reaches the ear.
Q.2: Explain how sound is produced by your school bell.
Ans : When the school bell vibrates, it forces the adjacent particles in air to vibrate. This disturbance gives rise to a wave and when the bell moves forward, it pushes the air in front of it. This creates a region of high pressures known as compression. When the bell moves backwards, it creates a region of low pressure know as rarefaction. As the bell continues to move forward and backward, it produces a series of compressions and rarefactions. This makes the sound of a bell propagate through air.
Q.3: Why are sound waves called mechanical waves?
Ans : Sound waves force the medium particles to vibrate. Hence, these waves are known as mechanical waves. Sound waves propagate through a medium because of the interaction of the particles present in that medium.
Q.4: Suppose you and your friend are on the moon. Will you be able to hear any sound produced by your friend?
Ans : Sound needs a medium to propagate. Since the moon is devoid of any atmosphere, you cannot hear any sound on the moon.
Q.5: Which wave property determines (a) loudness, (b) pitch?
Ans : (a) Amplitude (b) Frequency (a) The loudness of a sound depends on its amplitude. If the amplitude of a sound is large, then the sound produced will also be loud. (b) The pitch of a sound depends on its frequency. A sound will be considered a high pitched sound, if its frequency is high.
NCERT / CBSE Book for Class 9 Science
You can download the NCERT Book for Class 9 Science in PDF format for free. Otherwise you can also buy it easily online.
- Click here for NCERT Book for Class 9 Science
- Click here to buy NCERT Book for Class 9 Science
All NCERT Solutions Class 9
- NCERT Solutions for Class 9 English
- NCERT Solutions for Class 9 Hindi
- NCERT Solutions for Class 9 Maths
- NCERT Solutions for Class 9 Science
- NCERT Solutions for Class 9 Social Science
- NCERT Solutions for Class 9 Sanskrit
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