What are some basic physical notions that can be explained?

[Lluvia]

Hello All,

I teach intro physics and astro at a local community college. This is fun and all, however I have some rather silly questions about basic physical notions (such as the nature of physical quantities) and I figure I can ask my silly questions here and have someone please explain these basic things to me.

 

[berkeman]

Welcome to the PF.

Be sure to do a PF search (upper right of the page) as well. Many questions have been brought up here in the past. Nice to have you here!