It was a beautiful summer day on my vacation. My family was waiting for me to go to the beach. I'd told them I'd join in ...

Physics and Python stuff. Most of the videos here are either adapted from class lectures or solving physics problems. I really like to use numerical calculations without all the fancy programming ...

Golf balls do occasionally collide. It doesn't happen too often but it does occur occasionally. If a shot is played from off the putting surface and your ball hits another ball, what should you ...