Class 9 Exam > Class 9 Videos > Science Class 9 > Quick Revision: Sound
Quick Revision: Sound Video Lecture | Science Class 9
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FAQs on Quick Revision: Sound Video Lecture - Science Class 9
| 1. What is sound and how is it produced? |  |
Ans. Sound is a form of energy produced by vibrations. It is created when an object vibrates, causing the surrounding air particles to vibrate and create sound waves.
| 2. What is the difference between pitch and loudness in terms of sound? | |
Ans. Pitch refers to how high or low a sound is, determined by the frequency of the sound waves. Loudness, on the other hand, is the strength or intensity of the sound, which is determined by the amplitude of the sound waves.
| 3. How does sound travel through different mediums? | |
Ans. Sound can travel through solids, liquids, and gases. In solids, sound travels fastest due to the close arrangement of particles. In liquids, sound travels slower than in solids but faster than in gases, where particles are further apart.
| 4. What is the unit of measurement for sound intensity? | |
Ans. The unit of measurement for sound intensity is the decibel (dB). It is a logarithmic scale that measures the intensity of sound relative to a reference level.
| 5. How does the human ear process sound waves? | |
Ans. The human ear consists of three main parts - the outer ear, middle ear, and inner ear. Sound waves enter the ear canal, causing the eardrum to vibrate. These vibrations are then transmitted through the bones of the middle ear to the cochlea in the inner ear, where they are converted into electrical signals that are sent to the brain for processing.
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Nov 25, 2024 Last updated |
Video Description: Quick Revision: Sound for Class 9 2024 is part of Science Class 9 preparation.
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