Recent content by skh149

I am studying the synthesis of FDG for a job interview. The process of creating the F-18 used in FDG involves the collision of O-18 with an accelerated proton -- the proton kicks out a neutron and everything adds up. I am just wondering why a neutron is specifically knocked out, why wouldn't...

Hi there, of course I understand that it's an approximation, and that there will be more complexity to to consider in reality, but your explanation makes the most sense to me. I appreciate the dementional analysis especially. I was always lead to believe (not by physicists mind you) that...

Hi Jb444, Thanks, I hadn't heard of impulse in terms of a physics concept, I will look that up as it seems like it might be helpful for understanding the subject. When I said '"potential" velocity', I didn't mean anything technical by it, just that the bullet could have reached a higher...

Thank you for all the replies. Just to clarify, I am not too concerned with terminal ballistics or the practical effects on a target; although interesting, I understand there are trade-offs. What I am trying to figure out is why those trade-offs occur, and I think this discussion will help that...

Thanks for the reply Jr, having a term to search is useful enough. Would it be right to say that the velocity doesn't increase "proportionately" because it's contribution to kinetic energy is squared, and so if it did increase proportionately it would cause the two to no longer have equal...

I am wondering why heavier bullets have a higher momentum than lighter bullets when using similar powder charges? At the muzzle, a typical 150 grain bullet fired from a 30-'06 will travel at around 3000 ft/s. A 200 grain bullet from the same rifle will travel around 2600 ft/s. (The velocities...