You Can Do Physics Even When You're Goofing Off
b"Sometimes, when I'm proctoring an exam, I end up with a little too much time on my hands. So I play with stuff\\u2014whatever I've got on hand. In this case, it was one of those clicky pens. It had stopped writing, so I assumed it was out of ink. Of course it might not be out of ink, so I took it apart to look at the ink cartridge and check. That's when I discovered the fun stuff: If I push the empty ink cartridge down into the top of the pen, it compresses a spring.\\nLearn more about your ad choices. Visit podcastchoices.com/adchoices"