I have practically zero physics background. I understand a lot, but have zero knowledge of any higher physics math. Anyway, in pondering what things ive read related to physics, Im left with a few questions that completely puzzle me. First C... the speed of light is considered a constant, but is it relative to the emitter? Or is it a fixed absolute velocity which theoretically cannot be exceeded? Being relative to the emitter would make more sense, but leaves me with a lot more questions. Next, pressure. If you have a hypothetical container partitioned in the middle - one side has an absolute vacuum, and the other a single atom/diatom of a gas - will there be a pressure differential? And if so, it would seem that either the single atom is moving at relativistic speeds(?) to create such a vibration as to create pressure, or does it become more like a wave function in such a vacuum? Third - absolute velocity. If relativity states that as objects approach the speed of light, they become more massive, a) what happens to an object at an absolute speed of NIL, and b) if the said change in mass were observable, would one not be able to (theoretically) resolve the absolute speed of the earth by observing the nature of the very atoms/matter it is made of? and further, direction of velocity be resolved by moving an object at a different speed and observing the differences in the matter/atoms?