1. Buoyant Force
|Step(s) to Follow||Expected Result|
1. Float the smaller beaker in the larger beaker.
2. Draw the water line with the marker.
3. Ask students to make a prediction as to what will happen to the water level when the beaker sinks.
4. Sink the beaker.
5. Note the new water line.
|The water level will drop. Since copper's density (8.96 g/cm^3) is more than that of water, less water is displaced when the "ship" is sunk.|
The buoyant force (equal to the weight of the water that is displaced) equals the weight of the beaker + copper shot when the battleship floats. But, when sunk, only the volume of the glass + copper is displaced.