Links
- Videoer om pendul
http://www.youtube.com/watch?v=M8rrWUUlZ_U&feature=youtu.be&t=0m55s
http://www.youtube.com/watch?v=b14l3-A8iUQ&list=TLBmCJCOEPjFk - Videoer om tacoma broen
http://www.youtube.com/watch?v=3mclp9QmCGs&feature=youtu.be&t=1m8s - Video om bølger (animation)
http://www.youtube.com/watch?v=KpsR7pmbszk&feature=youtu.be&t