Crystalline solids must have a specific, orderly arrangement of atoms to be considered so.
Answer:
How high the sound or how low the sound is depending on the pitch of the sound which in this case the frequencies of the sound. The higher of the frequencies , the higher of the pitch but it has the shortest length of wave (λ). That's why AM radio have a longer range but bad audio quality than FM radio that have better audio quality with shorter range.
14 m/s or 50km/h. See the details in the attached picture.
Sound waves travel around the boxed room causing them to bounce of the nearest walls to the end of the room>
