Question

Questions 1 through 3 pertain to the situation described belou: Two speakers are set 10.0m apart, facing each other. A girl walks straightly to the other. The sound signals coming out the two sources with zero initial phase difference and frequency f facing each other. A girl walks from one speaker speakers are coherent f = 115 Hz. The speed of sound in the air is v 345 m/s. (1) How far must she walk to reach the first constructive interference point? (A) 0.50 m; (B) 0.75 m; (C) 1.00 m; (D) 1.25m; (E) 1.50 m. (2) How far must she walk to reach the first destructive interference point? (A) 1.70 m; (B) 1.50 m; (C) 1.25 m; (D) 1.00m; (E) 0.75 m. (A) 5; (B) 6; (C) 7; (D) 8; (E) 9.

Answer 1