Lectures on vibrations and waves as taught by Prof. Lewin at MIT in 2004 with lecture notes and problem sets. These lectures are originally from http://teachingexcellence.mit.edu, but are no longer available there.
Torrent file that I have has old trackers, so please update trackers:
udp://eddie4.nl:6969/announce
udp://tracker.opentrackr.org:1337/announce
udp://tracker.coppersurfer.tk:6969/announce
udp://tracker.leechers-paradise.org:6969/announce
udp://ipv4.tracker.harry.lu:80/announce
(or other working trackers at the time of your download)
Please seed for as long as you can!