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| 1. |
Two identical flutes produce fundamental notes of frequency 300 Hz at \[{{27}^{o}}\]C. If the temperature of air in one flute is increased to \[{{31}^{o}}\]C, the number of the beats heard per second will be [UPSEAT 2002] |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |