Solved: The entrance to a boys bedroom consists of two
Chapter , Problem 74(choose chapter or problem)
The entrance to a boys bedroom consists of two doorways,each 1.0 m wide, which are separated by a distance of3.0 m. The boys mother yells at him through the two doorsas shown in Fig. 35-48, telling him to clean up his room.Her voice has a frequency of 400 Hz. Later, when themother discovers the room is still a mess, the boy says henever heard her telling him to clean his room. The velocityof sound is 340 m/s. (a) Find all of the angles 0 (Fig. 35-48)at which no sound will be heard within the bedroom whenthe mother yells. Assumesound is completely absorbedwhen it strikes a bedroomwall. (b) If the boy was at theposition shown when hismother yelled, does he have agood explanation for nothaving heard her? Explain.
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