MinutePhysics: How Long To Fall Through The Earth? (YouTube, 5 minutes)
Category Archives: Physics
Brainteaser
Physics Girl: Can you solve this pier puzzle? (YouTube)
“Can you figure it out? There are two towns near a shore. They want to build a pier on the shoreline with a path connecting the pier to each town. They want to use as little material as possible, so they need to put the pier in a location on the shoreline that minimizes the total length of both paths added together. Where should they put the pier?”
Do you know who Margaret Hamilton is?
Time: Remembering the Apollo 11 Moon Landing With the Woman Who Made It Happen. “Margaret Hamilton’s software got man to the moon—but she didn’t stop there.” By Lily Rothman, July 20, 2015.
Here’s Margaret Hamilton on Wikipedia.
What are Gravitational Waves?
MinutePhysics: Gravitational Waves Explained Using Stick Figures. (YouTube, 3 minutes)
Glass – liquid or solid?
Veritasium: Is Glass a Liquid? (YouTube, 7 minutes)
You might have heard the myth that very old glass windows are thicker at the bottom than at the top because glass is a liquid that flows very slowly. However, glass lenses in very old telescopes don’t show the same effect. This video explains both and the difference between solids and liquids.