Решение задачи по физике раздел 50 пункт 47 волны

47. The train travels at a speed of u = 120 km / h. He whistled a duration τ0 = 5. What will be apparent duration τ whistle for a stationary observer, if: 1) the train approaching it; 2) deleted? Take the speed of sound is 348 m / s.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)