Summary: Sound Wave speed + phase of media. Word problem + short explanation. PDF.
**Resubmission in case previous URL didn’t work.
**Please accept my late submission. I know I left this submission to the last minute. However, I do not have Facebook or Linkedin and had to create an account at the last minute before be able to log in to slide share. In any event, I am sorry for my tardiness. Cheers. Damian Feldman-Kiss. 12036133.