Explain why two boys heard the sound from a guitar at different times, considering a floating stage and a tall storage building.

Here's a breakdown of the physics concepts for the boys:

a) Why they heard the sound at different intervals.
The boys heard the sound at different intervals due to two main reasons:

• Different Distances from the Source: Sound travels at a finite speed. Since Boy X heard the sound after 3 seconds and Boy Y after 4 seconds, they must have been at different distances from the guitar player on the floating stage. The boy closer to the source hears the direct sound earlier.
• Echoes: The sound waves traveled directly from the guitar to the boys, and also traveled to the tall storage building (a reflecting surface) and then reflected back to the boys. The reflected sound, or echo, takes a longer path and thus arrives later than the direct