Consider the following three particles: 1. a free electron with kinetic energy k 2. a free proton with kinetic energy k 3. a free proton with kinetic energy 2k rank them according to the wavelengths of their waves, greatest to least (b) 3,2, 1 (c) 2,3, 1 (e) (to 1, then 2 and 3 tied none of the above

im guessing the west of station b

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