Water Hammer

water hammer

 

  •  The water-containing flask has been partially evacuated, allowing the water inside to fall as one solid column. (Typically water breaks up as it falls through air, due to drag.) The sound made when the water hits the bottom is quite remarkable.
  • To use: hold the flask vertically with the bulb at the top. Quickly shake the flask up and down once. When the water hits the bottom it sounds (and feels!) more like a solid metal object than a fluid.  In fact, I’m convinced that the flask would break if shaken hard enough, though the information sheet doesn’t caution against it.
  • Located in L02, section D1.

 

Franklin’s Flask

 

Franklins Flask Demo Picture

  • Demonstrate Boiling at a Reduced Temperature and Pressure.
    Initially, the flask should be in a normal upright position and partially
    filled with water. After bringing the water to a boil, close off the neck
    with a rubber stopper fitted with a thermometer and invert the flask. Place
    ice in the concave bottom. Water should start to boil again, and continue
    to boil until it is only 15° or 20° above room temperature.
  • Located in L02, section C3.

 

Magdeburg Plates

 

Magdeburg Plates Demo Picture Magdeburg Plates Demo Picture 2 Magdeburg Plates Demo Picture 3

  • Place circular plates in contact with each other; evacuate
    air using syringe; attempt to pull plates apart.
  • Using transparent cylinder and circular plate, evacuate air
    to boil water, inflate balloon, or un-stick a suction cup.
  • Located in L02, section C3.