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 ...

how did the state begin recommending that the names of the public officials using credit cards be kept secret? David Von Moll is the longtime state comptroller who heads the Virginia Department of ...

The Briefing – Weekly updates on the world of news and information Learn about key topics that Pew Research Center studies through short email lessons delivered to your inbox. Polling Why do we have ...