Respuesta :
The jet did not break the sound barrier at Julia's location. The jet broke the barrier before it reached Julia's location. This is proven by the delay between seeing the jet and hearing the sonic boom because the speed of light is faster than the speed of sound.
The fighter jet had broken the sound barrier before it passed Julia.
The speed has been defined as the time taken by the particle to travel as unit distance. The breaking of speed barrier has been defined as traveling with the speed faster than light.
A sound barrier has been defined as a high pressure area, with the limit to the travel. The fire jet play experienced by Julia has speed heard 3 seconds prior to the fighter.
This has been implying that the speed of sound of jet has been higher than the speed of light. Thus, the jet had broken the sound barrier before it passed Julia.
For more information about sound barrier, refer to the link:
https://brainly.com/question/957478