Videos to show in Lecture #1, 2022 02 01, 18.300
Note: #4 #5 #6 #8 #9 and #10 were not done.
      Maybe I will show them at a later opportunity.

#1 A lecture on shocks.
   Slides prepared for this lecture.

#2 Sonic booms, Hydraulic jumps, Cherenkov Radiation, Kelvin Wake.
   Various videos and pictures from the web.
   Recommended video: "This Is Not a Shockwave"
                     https://www.youtube.com/watch?v=uO4FckCAZtU

   Note that some technical details here are wrong. Most important:
   --- How sonic booms form. Nonlinearity is crucial here. The linear
       mechanism presented in the video is correct for Cherenkov radiation
       and the Kelvin wake (at least not too close to the ship, where the
       non-linear effects matter), but not quite so for shocks.
   --- Cherenkov radiation is not a shock wave.
   
#3 Videos - Sonic Booms Videos and Pictures.
   You can find many pictures and videos in the web showing "sonic booms",
   identified as the white stuff you see planes producing when flying in a
   water-saturated atmosphere. As explained in the lecture [and the main
   video in #2], this white stuff is not produced by the sonic boom but by
   the expansions fans generated by the "trailing edges" in the plane, and
   can happen even for subsonic flight.

#4 Nasa stuff on shocks in space.
   NOT SHOWN IN LECTURE #1.
   The material can be found at the following links:
      http://ibex.swri.edu/students/What_defines_the_boundary.shtml
      http://ibex.swri.edu/students/What_is_the_interstellar.shtml
      http://ibex.swri.edu/students/What_happens_when_the.shtml
      http://ibex.swri.edu/students/What_is_the_bow.shtml
      http://ibex.swri.edu/students/What_is_the_heliopause.shtml
      http://ibex.swri.edu/students/What_is_the_termination.shtml
      http://ibex.swri.edu/students/What_is_outside_the.shtml
      http://ibex.swri.edu/students/How_does_the_Solar.shtml
   While we will not do Astrophysics in the class, the material we will cover
   is the basis needed to understand the wave phenomena shown in these sites.

#5 Hydraulic Analog for the Solar System.
   NOT SHOWN IN LECTURE #1.
   This is a picture taken from the paper:
   "A shock on Voyager 2" by J. R. Jokipii,
   NATURE, Vol. 454, 3 July 2008 (News and Views).

#6 The Early Flash of an Exploding Star - Caught by Kepler.
   NOT SHOWN IN LECTURE #1.
   Animation for a supernova explosion, from the NASA site:
   https://www.nasa.gov/feature/ames/Kepler/caught-for-the-first-time-the-early-flash-of-an-exploding-star/

#7 Prince Rupert's Drops.
   Prince Rupert's Drops are very tough/hard to break, but they "explode" if
   their tail is broken. Breaking the tail [weakest point] starts a wave that
   propagates down the drop, releasing the elastic energy stored in the drop.
   This wave is, mathematically, the same as a detonation wave.   If there is
   time, I will describe these waves at some later time, when we have the math.
   needed. Surprisingly, the same exact math. appears when modeling "phantom
   traffic jams" in traffic flow, and "roll waves" in hydraulics --- I showed
   examples of these in "#1 A lecture on shocks".
   Relevant videos:
   --- Prince Rupert's Drops Are Stronger Than Steel
       https://www.youtube.com/watch?v=5zxZkK2aJig
   --- Prince Rupert's Drop vs Hydraulic Press [4K-Slow Motion] (S1 E9)
       https://www.youtube.com/watch?v=A6NUNroyUys
   --- Mystery of Prince Rupert's Drop at 130000 fps - Smarter Every Day 86
       https://www.youtube.com/watch?v=xe-f4gokRBs

#8 Polygonal hydraulic jumps.
   NOT SHOWN IN LECTURE #1.
   This is a picture taken from the paper:
   "Cover illustration: Polygonal hydraulic jumps",
   by Clive Ellegaard, Adam Espe Hansen, Anders Haaning, Kim Hansen, Anders
      Marcussen, Tomas Bohr, Jonas Lundbek Hansen, and Shinya Watanabe.
   Nonlinearity 12 (1999) pp 1--7.

#9 Shocks and Chaos -- Galloping Detonations.
   NOT SHOWN IN LECTURE #1.
   I will show these slides at a later date, once you have the proper
   background to see beyond the pictures.

#10 RESONANCE.
   NOT SHOWN IN LECTURE #1.
   These will be shown at a later time. They include a slow motion video
   showing how a wine glass breaks, when forced with the right frequency
   [Shattering Wineglass] and how sound affects burning in Ruben's Tubes.
EOF