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Describe with the help of a diagram, how compressions and rare
Science
Science

Class 9

NCERT

Publisher:
NCERT
Subject:
Science
1

Chapter 1: Matter in Our Surroundings

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2

Chapter 2: Is Matter Around Us Pure?

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3

Chapter 3: Atoms and Molecules

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4

Chapter 4: Structure of the Atom

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5

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6

Chapter 6: Tissues

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7

Chapter 7: Diversity in Living Organisms

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8

Chapter 8: Motion

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9

Chapter 9: Force and Laws of Motion

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10

Chapter 10: Work and Energy

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11

Chapter 11: Sound

25 questions

Q1
What is sound and how is it produced?
Q2
Describe with the help of a diagram, how compressions and rarefactions are produced in air near a source of sound?
Q3
Cite an experiment to show that sound needs a material medium for its propagation.
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12

Chapter 12: Why do We Fall Ill?

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13

Chapter 13: Natural Resourses

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14

Chapter 14: Improvement in Food Resources

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15

Chapter 15: Gravitation

29 questions

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Question
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Describe with the help of a diagram, how compressions and rarefactions are produced in air near a source of sound?

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Updated on: Mar 27, 2023

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Describe with the help of a diagram, how compressions and rarefactions are produced in air near a source of sound?
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When a vibrating body swings forward, it pushes and compresses the air in front of it creating a region of high pressure. This region is called a compression. This compression starts to move away from the vibrating object.
When the vibrating body swings backwards, it creates a region of low pressure called rarefaction. As the object swings / oscillates back and forth rapidly, a series of compressions and rarefactions is created in the air. These make the sound wave that propagates through air.
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Question Text
Describe with the help of a diagram, how compressions and rarefactions are produced in air near a source of sound?
Updated OnMar 27, 2023
TopicSound
SubjectScience
ClassClass 9
Answer TypeText solution:1 Video solution: 24
Upvotes2439
Avg. Video Duration4 min