Imagine that treble sounds could travel at 400 m/s, but bass sounds traveled at only 300 m/s. if sound actually behaved that way, and you were listening to a brass band from a distance of 120m, how much delay would you hear between trumpet and tuba notes when they begin a chord together?

Explanation:

We need to calculate the difference between the times the waves from the bass sounds () and treble sounds () take to reach us, that is, .

Since , then and we can write:

reserve is the answer

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me