Recent content by John Covert

Thank you, Dave.

Hello. John Covert. I must admit initially I registered in order to ask a question. I am a lay person, retired, and my work history did not involve physics. (And I'm sure someone will point out that EVERYTHING involves physics . . .)

I am a lay person, so the physics lesson would only confuse me. I do reloading of ammunition for competitive shooting (Cowboy Action Shooting). I have someone offering to sell lead for melting and casting bullets. He has indicated its source was shielding from hospitals used in X-ray shielding...