1. G

    Can noise, from a few seconds of low flying jet, arrive at my position all at once?

    it was hard to ask this question in such a short title, sorry This question has been in my mind for decades. When I lived in Wales, the hilly terrain was used for training by RAF fighter jets which would cross a hill about 4k away, and do what appeared to be a mock bombing run on our large...
  2. A

    How fast can we arrive at a certain place, in theory?

    Hi there, In theory, we cannot travel faster than light. Therefore, is the answer to this question "The speed of light" ? Definitely NO. According to Enstain's Special Theory of Relativity, if someone travels in a inertial reference frame which moves at a speed that near the speed of...