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				| 1. | A source of frequency 50Hz is moving towards an observer with a deceleration of 2m/s2. If its initial speed is 20m/s, what will be the maximum frequency heard by the observer? Initial distance between source and observer is 100m. Speed of sound = 330m/s. | 
| A. | 47.14Hz | 
| B. | 0 | 
| C. | 53.22Hz | 
| D. | 53.03Hz | 
| Answer» D. 53.03Hz | |