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Cochlea. ..group  1

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Nithya,Aditya,Shreyas,vinay

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Flow chart

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You can hear someone who is in another room because sound can travel through solids  so as the walls
are solids you can hear
the other person without a door or window.

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Why can u hear someone who is in other room

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Ear drum

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Stirrup and anvil and hammer

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In our ear which part sends messages to our brain

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Sound can travel through solids and the railway track is a solid .
Sound travels faster in solids than in gas hence we can hear sound by placing our ears on the railway track much before we can see it coming

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Which part of the ear vibrates first?

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The source are the strings and the medium is gas and the vibrations is causing the sound.

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Sound is a longitudinal wave and is created when an object vibrates.

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They can communicate in oceans because sound can travel through liquids.

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1-Sound can be absorbed
2-Sound can be reflected
3-Sound is caused due to vibration

4-Sound can be modified (eg- pitch and modulations)
5-Sound travels in waves
6-Sound needs a medium to travel

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We do because sound can bounce off things and reflect back to us.Hence we can hear echoes as a valley is surrounded with mountain

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7. Why do we hear echoes  when we shout in the middle of a valley?

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7. Why do we hear echoes  when we shout in the middle of a valley?

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6. Dolphins can communicate in oceans, Explain.

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6. Dolphins can communicate in oceans, Explain.

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4. I can hear the sound of the coming train, if i put my head on the railway track.

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4. I can hear the sound of the coming train, if i put my head on the railway track.

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3. Name the source and medium. What has caused the sound?

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3. Name the source and medium. What has caused the sound?