I was curious if there were any unsolved physics problems and if so which is the most important or intriguing. I have been meaning to contribute to the scientific field in some capacity and I think solving an unresolved issue in physics could do just that. Thanks!
Hi,
I was hoping I could get a good idea on the best "path" or "progression" to learn math starting from around a 4th grade level. My son has become very interested in math and wants me to get him some books and teach and help him when he gets stuck. That has inspired me to learn more maths as...