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Sound Video Lecture | Science Class 8

91 videos|259 docs|44 tests

FAQs on Sound Video Lecture - Science Class 8

1. What is sound and how is it produced?
Ans. Sound is a form of energy that is produced by vibrations. When an object vibrates, it causes the molecules in the surrounding medium to also vibrate, creating sound waves.
2. How does sound travel through different mediums?
Ans. Sound travels through different mediums, such as air, water, and solids, by causing the molecules in the medium to vibrate. The speed of sound varies depending on the medium it is traveling through.
3. What is the difference between pitch and volume in sound?
Ans. Pitch refers to how high or low a sound is, which is determined by the frequency of the sound waves. Volume, on the other hand, refers to the loudness or softness of a sound, which is determined by the amplitude of the sound waves.
4. How do we hear sound?
Ans. When sound waves enter our ear, they cause our eardrum to vibrate. This vibration is then transmitted through the bones in the middle ear to the cochlea in the inner ear, where it is converted into electrical signals that are sent to the brain for interpretation.
5. Can sound waves be reflected, refracted, or diffracted?
Ans. Yes, sound waves can be reflected, refracted, and diffracted. Reflection occurs when sound waves bounce off a surface, refraction occurs when sound waves change direction as they pass through different mediums, and diffraction occurs when sound waves bend around obstacles.
91 videos|259 docs|44 tests

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