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Chapters
2: Motion
3: Fluids
4: Electric charge and Electric current
5: Magnetism and Electromagnetism
6: Light
7: Heat
▶ 8: Sound
9: Universe
10: Matter Around Us
11: Atomic Structure
12: Periodic Classification of Elements
13: Chemical Bonding
14: Acids, Bases and Salts
15: Carbon and its Compounds
16: Applied Chemistry
17: Animal Kingdom
18: Organisation of Tissues
19: Plant Physiology
20: Organ Systems in Animals
21: Nutrition and Health
22: World of Microbes
23: Economic Biology
24: Environmental Science
25: Computer – LibreOffice Impress
![Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 8 - Sound - Shaalaa.com](/images/science-english-class-9-tn-board_6:5f2b1b2038084cf381bfa42c826a928c.jpg "Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 8 - Sound")
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Solutions for Chapter 8: Sound
Below listed, you can find solutions for Chapter 8 of Tamil Nadu Board of Secondary Education Samacheer Kalvi for Science [English] Class 9 TN Board.
Samacheer Kalvi solutions for Science [English] Class 9 TN Board 8 Sound Exercise [Pages 100 - 101]
Choose the correct answer.
Which of the following vibrates when a musical note is produced by the cymbals in a orchestra?
stretched strings
stretched membranes
air columns
metal plates
Sound travels in air:
if there is no moisture in the atmosphere.
if particles of medium travel from one place to another.
if both particles as well as disturbance move from one place to another.
if disturbance moves.
A musical instrument is producing continuous note. This note cannot be heard by a person having a normal hearing range. This note must then be passing through ______.
wax
vacuum
water
empty vessel
The maximum speed of vibrations which produces audible sound will be in ______.
seawater
ground glass
dry air
Human blood
The sound waves travel faster ______.
in liquids
in gases
in solids
in vacuum
Fill in the blank.
Sound is a ______ wave and needs a material medium to travel.
Number of vibrations produced in one second is ______.
The velocity of sound in solid is ______ than the velocity of sound in air.
Vibration of object produces ______.
Loudness is proportional to the square of the ______.
______is a medical instrument used for listening to sounds produced in the body.
The repeated reflection that results in persistence of sound is called ______.
Match the following.
| 1. | Tuning fork | The point where density of air is maximum |
| 2. | Sound | Maximum displacement from the equilibrium position. |
| 3. | Compressions | The sound whose frequency is greater than 20,000 Hz. |
| 4. | Amplitude | Longitudinal wave. |
| 5. | Ultasonics | Production of sound. |
Answer briefly.
Through which medium sound travels faster, iron or water? Give reason.
Name the physical quantity whose SI unit is ‘hertz’. Define.
What is meant by supersonic speed?
How does the sound produced by a vibrating object in a medium reach your ears?
You and your friend are on the moon. Will you be able to hear any sound produced by your friend?
Describe with diagram, how compressions and rarefactions are produced.
Verify experimentally the laws reflection of sound.
List the applications of sound.
Explain how does SONAR work?
Numerical problem.
The frequency of a source of sound is 600 Hz. Calculate the numbner of times it vibrates in a minute?
Numerical problem.
A stone is dropped from the top of a tower 750 m high into a pond of water at the base of the tower. Calculate the number of seconds for the splash to be heard? (Given g = 10 m s–2 and speed of sound = 340 m s–1)
Solutions for 8: Sound
Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 8 - Sound
Shaalaa.com has the Tamil Nadu Board of Secondary Education Mathematics Science [English] Class 9 TN Board Tamil Nadu Board of Secondary Education solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. Samacheer Kalvi solutions for Mathematics Science [English] Class 9 TN Board Tamil Nadu Board of Secondary Education 8 (Sound) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.
Further, we at Shaalaa.com provide such solutions so students can prepare for written exams. Samacheer Kalvi textbook solutions can be a core help for self-study and provide excellent self-help guidance for students.
Concepts covered in Science [English] Class 9 TN Board chapter 8 Sound are Law of Reflection of Light, Properties of Sounds, Loudness and Intensity, Pitch (or shrillness) and frequency, Quality (Or Timbre) and Wave Form, Speed of Sound (Velocity of Sound), Speed of Sound in Different Media, Reflection of Sound, Application of Reflection of Sound, Echoes, Reverberation, Ultrasonic Sound Or Ultrasound, SONAR, Human Ear, Electrocardiogram (ECG), Sound, Sound Need a Medium to Travel, Characteristics of a Sound Wave, Properties of Sounds, Production of Sound, Propagation of Sound.
Using Samacheer Kalvi Science [English] Class 9 TN Board solutions Sound exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in Samacheer Kalvi Solutions are essential questions that can be asked in the final exam. Maximum Tamil Nadu Board of Secondary Education Science [English] Class 9 TN Board students prefer Samacheer Kalvi Textbook Solutions to score more in exams.
Get the free view of Chapter 8, Sound Science [English] Class 9 TN Board additional questions for Mathematics Science [English] Class 9 TN Board Tamil Nadu Board of Secondary Education, and you can use Shaalaa.com to keep it handy for your exam preparation.
