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 Additional Questions With Solutions. 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_solutionsAdditional Questions With Solutions
Ques: What is sound?
Ans: When an object vibrates, it produces sound.
Ques: What is eco sound?
Ans: When any sound reflects by striking on any medium, that sound heard us again and again. This is called eco sound.
Ques: What is minimum audible range for human ears?
Ans: The audible range is 20 Hz to 20,000 Hz.
Ques: What is minimum audible distance from sound source to barrier medium?
Ans: 17.2 m.
Ques: What is S.I unit of frequency?
Ans: Hz (Hertz).
Ques: What is S.I unit of wave length?
Ans: S.I unit of wave length is meter.
Ques: By what organ human produces sound?
Ans: Vocal cord. (Larynx)
Ques: How do we produce sound?
Ans: Two vocal cords, are stretched across the voice box or larynx in such a way that it leaves a narrow slit between them for the passage of air When the lungs force air through the slit, the vocal cords vibrate, producing sound.
Ques: In which mediums sounds propagate?
Ans: Solid, liquid and gas.
Ques: In which medium sound does not propagate?
Ans: Vacuum.
Ques: What is eardrum?
Ans: The shape of the outer part of the ear is like a funnel. 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.
Ques: Write the function of eardrum.
Ans: The eardrum sends vibrations to the inner ear.
Ques: What is oscillatory motion?
Ans: The to and fro motion of an object is known as vibration. This motion is also called oscillatory motion.
Ques: What is frequency? Write is its S.I unit?
Ans: The number of oscillations or vibrations per second is called the frequency of oscillation. The frequency is expressed in hertz (Hz).
Ques: On which measure does loudness of sound depend?
Ans: On its amplitudes.
Ques: What are two important properties of sound?
Ans: Amplitude and frequency are two important properties of any sound.
Additional Questions With Solutions 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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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 Additional Questions With Solutions 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, Additional Questions With Solutions 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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