The pictures third and fourth from the bottom (the glass tubes with the bulbs on the end) demonstrate a water hammer.
Water is added to the tube and a vacuum is pulled and the tube sealed. Holding the bulb end up, you sharply shake the tube downwards. The water will fall as a solid mass (instead of splitting up due to air) and make a distinctive clink against the bottom of the tube. https://www.youtube.com/watch?v=-G2AeWTCWfI
On Friday, June 4, 2021, 09:39:59 AM PDT, John Sohl via Phys-l <phys-l@mail.phys-l.org> wrote:
Hi All, especially you older guys like me. A couple of us have been
completely cleaning out and reorganizing our lecture demo prep/storage
area. We have come across thirteen items that I have little to no idea what
they are, how they are used, and if they are worth keeping. I've made a
list of photos and put them on the internet here:
- - - -
John E. Sohl, Ph.D.
WSU Brady Presidential Distinguished Professor
Department of Physics and Astronomy
Department of Environmental Science
Weber State University
1415 Edvalson St., Dept 2508
Ogden, UT 84408-2508
Office: TY 326
Office phone: (801) 626-7907
cell: (801) 476-0589 (Text me, I don't answer the phone if you are not in
my contacts.)
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