Hi, I am having trouble with the following question: A jet fighter in level flight passes directly overhead at a speed corresponding to Mach number 1.35. The sonic boom is heard by you on the ground 12.0 s later. What is the altitude of the plane? Assume (unrealistically) the speed of sound does not change with altitude. Answer should be in km. I know that Mach numbers are velocity(object)/velocity(medium) which gives: 1.35 = velocity(object)/343 m/s, therefore velocity of the plane is 463.05 m/s From there I took the time, 12.0s, and multiplied by 463.05m/s to get 5556.6 m, or 5.5566km, but this is not right. COuld anyone offer me some suggestions for this one? Thanks!!!!!