Explain an activity to show that sound can do work
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National Council of Educational Research and Training (NCERT) Book for Class VIII
Subject: Science
Chapter: Chapter 13 – Sound
Class VIII NCERT Science Text Book Chapter 13 Sound is given below.
How do you come to know that a ‘period’ is over in your school? You come to know easily that someone is at your door when he knocks or you hear the sound of the doorbell. Most of the time you can make out that someone is approaching you by just hearing the foot steps.
You might have played a game called hide and seek. In this game a person is blind-folded and has to catch the remaining players. How is the blindfolded person able to guess which player is closest to her?
Subject: Science
Chapter: Chapter 13 – Sound
Class VIII NCERT Science Text Book Chapter 13 Sound is given below.
How do you come to know that a ‘period’ is over in your school? You come to know easily that someone is at your door when he knocks or you hear the sound of the doorbell. Most of the time you can make out that someone is approaching you by just hearing the foot steps.
You might have played a game called hide and seek. In this game a person is blind-folded and has to catch the remaining players. How is the blindfolded person able to guess which player is closest to her?
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