Toppers Study Toppers Study Toppers StudyGet complete NCERT Solutions for 8 Science 13. Sound with detailed explanations. Easy-to-understand answers to help students study effectively and score better.
Get complete NCERT Solutions for 8 Science 13. Sound with detailed explanations. Easy-to-understand answers to help students study effectively and score better.
Preparing for exams becomes easier with Chapter Review. Whether you are studying for board exams or mid-term exams, 8 Science Chapter 13. Sound solutions provide quick revising points, well-structured answers, and additional practice material to help you score better.
ncert_solutionsWhen an object vibrates, it produces sound.
When any sound reflects by striking on any medium, that sound heard us again and again. This is called eco sound.
The audible range of human ears is 20 Hz to 20,000 Hz.
The S.I unit of frequency is Hz (Hertz).
The S.I unit of wave length is meter.
The to and fro or back and forth motion of an object is termed as vibration.
In humans, the sound is produced by the voice box or the larynx.
The vocal cords in men are about 20mm long. In women these are about 5mm shorter.
When air has been removed completely from a vessel, it is said that there is vacuum in the vessel.
When sound enters in it, it travels down a canal at the end of
which a thin membrane is stretched tightly. It is called the eardrum.
The to and fro motion of an object is known as vibration. This motion is also called oscillatory motion.
The number of oscillations per second is called the frequency of oscillation.
The loudness of sound depends on its amplitude. When the amplitude of vibration is large, the sound produced is loud. When the amplitude is small, the sound produced is feeble.
The loudness is expressed in a unit called decibel (dB).
Unpleasant sounds are called noise.
Some animals can hear sounds of frequencies higher than 20,000 Hz.
Dogs have this ability.
Sound travels through a medium (gas, liquid or solid). It cannot travel in vacuum.
Chapter Review are created by experts to give step-by-step explanations. Around 60–70% of exam questions are based on NCERT concepts. Our 8 Science Chapter 13. Sound solutions help you understand the core concepts and practice effectively.
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Every NCERT chapter ends with exercises, and solving them is crucial. Our Chapter Review include complete solutions for 8 Science Chapter 13. Sound exercises. With step-by-step answers, you gain clarity and confidence to attempt similar exam questions.
To boost your preparation, we also provide additional important questions with answers. These are prepared from previous year board papers, sample papers, and important concepts of Chapter 13. Sound. Practicing these ensures you are well-prepared for both board and mid-term exams.
Our Chapter Review are useful for both board exams and mid-term exams. For 8 Science, we provide notes, exercises, and important Q&A so that you can revise smartly and write perfect answers in exams.
In short, Chapter Review for 8 Science Chapter 13. Sound are a complete study package. With quick revising points, NCERT exercises, and additional important questions, you can prepare effectively for exams. Make these solutions your study companion and excel in your academic journey.
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