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If you place your ear close to an iron r...

If you place your ear close to an iron railing which is tapped some distance away, you hear the sound twice. Explain why?

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To explain why you hear the sound twice when you place your ear close to an iron railing that is tapped some distance away, we can break it down into the following steps: ### Step-by-Step Solution: 1. **Understanding Sound Propagation**: Sound is a mechanical wave that travels through different mediums (like air and iron) at different speeds. 2. **Speed of Sound in Different Mediums**: The speed of sound is much faster in solids (like iron) compared to gases (like air). For example, the speed of sound in iron is approximately 5000 m/s, while in air, it is about 343 m/s. ...
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