Ok a full paragraph is at least 5 sentences
1. "A sonic boom is a phenomenon that happens when a supersonic plane travels at speeds greater then the speed of sound."
2. "The way this happens is that as the plane is traveling at supersonic speeds ( speeds greater than that of sound) this means it's going faster than its own sound."
3. "As a result, a pressure wave is produced in the shape of a cone which has its vertex at the nose of the plane and its base behind the plane."
4. "The angle opening on the cone depends on the speed the plane is traveling at. All of the sound pressure is contained in this cone."
5. "Imagine the plane is traveling towards you. As it reaches near you, you can see it but you cannot hear anything. As your ears touch the edge of the cone, you hear the very loud sonic boom. You hear the sonic boom as your ears reach the cone ; not when the plane breaks the sound barrier."
Hope this helps. Okay its more than 5 but maybe thats better :D
