Physics Questions - Weekly Discussion Thread - January 27, 2026

This thread is a dedicated thread for you to ask and answer questions about concepts in physics.

Homework problems or specific calculations may be removed by the moderators. We ask that you post these in r/AskPhysics or r/HomeworkHelp instead.

If you find your question isn't answered here, or cannot wait for the next thread, please also try r/AskScience and r/AskPhysics.