Hello, I have recently studied that a quantum particle can't have a zero kinetic energy, as it would violate the uncertainty principle, so I thought of these questions that are related to the topic: 1- At very heigh energies the speed of a particle cannot be less than a certain amount, so is it possible to apply the speed of light limit and ΔP would be limited to the minimum possible speed of that energy and the speed of light, would that increase ΔX? 2- Is the zero kinetic energy not possible for the same reason that the absolute zero temperature is not allowed? I mean is that the reason; if something reaches zero Kalvin temperature then the energies of it's particles are 0, and that would violate the uncertainty principle? 3- If these are the cases, then would it make sense, given that the temperature is related to the average speed (root mean square speed), that at very low temperatures and very high temperatures a macroscopic object would have a high ΔX, or at least each of its parts? I can't imagine what would happen then.