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PIRA-List
Fluid mechanics > Statics of fluids > Density and Buoyancy
Code
Demo Name
Description
2B40.11
Weight in Water
Showcase the the buoyant force by weighing an object with a spring scale, then weighing it again when it is submerged in water. Use the change in weight and volume to determine the material of the object.
2B40.11
Why Ships Float
In this demonstration two steel balls of equal mass but different volumes are used to explain why massive ships float.
2B40.15
Fingering out Buoyancy
A beaker of water and a weight are placed on opposite ends of a balance beam scale. The beam is even until you dip your finger into the water.
2B40.20
Archimedes Principle
A mass and bucket of the same volume hang from a spring scale. Lower the mass into water, catch the overflow, and pour the overflow into the bucket.
2B40.29
Rock in Boat - Buoyancy puzzle s
2B40.30
Cartesian Diver
A small vial Cartesian diver submerged by squeezing the bottle.
2B40.57
Sinking and Floating Cans
Cans of regular Coke or Pepsi sink, diet Coke and diet Pepsi will float in a container of water. Add salt to the water and the regular Coke or Pepsi will rise.
2B40.59
Sinking and Floating Objects
Three objects are placed in a tank of water: a regular bowling ball, a hollow bowling ball, and a pumice stone
2B40.61
Why Objects Sink and Float
Two identically sized bowling balls are placed in a tank of water. One ball sinks and one ball floats, but how could that be?
2B40.85
Different Sized Density Balls
Density with Bean Bowl Demo
Different Sized Density Balls
Bury a 40 mm Ping Pong ball in a bowl of Pinto beans and then place a 40 mm steel ball on top. Shake the bowl and the Ping Pong ball will rise to the top while the steel ball will sink to the bottom.
Disclaimer:
These demonstrations are provided only for illustrative use by persons affiliated with Rutgers University and only under the direction of a trained instructor or physicist. Rutgers University is not responsible for any demonstrations performed by those using their own or others equipment, or who choose to use this reference material for their own purpose. The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources. Performing all or any portion of any of these demonstrations, with or without revisions not depicted here, entails inherent risks. These risks include, without limitation, bodily injury (and possibly death), risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition, and property loss or damage. Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.