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| Q. |
Speed of sound is the greatest in : |
| A. | Water |
| B. | Air |
| C. | Glass |
| D. | Glycerine |
| Answer» C. Glass | |
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Explanation: Sound travels faster in liquids and non-porous solids than it does in air. It travels about 4.3 times as fast in water (1,484 m/s), and nearly 15 times as fast in iron (5,120 m/s), than in air at 20 degrees Celsius. |
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