Respuestas al mensaje #1

🔧 Site instability resolved. You can report double-posts and broken attachments. For bigger issues, use the Technical Grievances thread.
🇵🇦 Nuestro primer dominio localizado está en español en kiwifarms.pa. Our first localized domain is on Spanish on kiwifarms.pa.

Correct of course, I screwed up. The point still stands, though, because mass is an attribute of matter. Specifically, in classical mechanics...