I've got a few questions about the uncertainty principle and I'm new to more advanced physics. So from what I understand about the uncertainty principle is, Ok, I've got a particle. And say, I want to know the exact location of the particle. And the wave amplitude is highest closest at its location. So I get alot readings of this particle's momentum which in turn I can find the amplitudes and wavelengths, and this would guide me to the location of the particle. But, in the course of doing so, I actually can't figure out the momentum of the particle because I used tons of readings of the momentum to pinpoint its location. Is this right? But there are still a few questions, 1. Isn't momentum varaible as in it varies with time right? As time goes by, won't there be external forces acting upon the particle? 2. Isn't a particle always moving as it has not experienced the absolute zero? Or is it in this case we are interested in looking for the momentum and location of a particle at a certain instance? But if so, isn't finding a set of values for momenta enough? And from this, can't we exactly define the particle location and momentum? Do we take the time which these 2 things vary into consideration here? Yea, thanks for any help. Also, actually I'm more interested in nuclear physics, but do I have to understand quantum physics in order to do nuclear?