Buoyancy
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1. What makes things float?

2. What does the word "displacement" mean?

3. A ball of tin foil sinks to the bottom of an aquarium. Another piece of tin foil the same size can float. What makes the difference?

4. What did Archimedes figure out about displacement and volume?

5. If an object has positive buoyancy, what will it do when placed in water?

6. If an object has negative buoyancy, what will it do when placed in water?

7. If an object has neutral buoyancy, what will it do when placed in water?

8. When is neutral buoyancy useful or necessary?

Buoyancy, displacement, Archimedes' principle, positive/negative/neutral buoyancy, and applications of neutral buoyancy are key concepts in understanding why objects float or sink.

Explanation:

Buoyancy:

Buoyancy is the force that makes things float.
Displacement refers to the act of moving something from its place or the measurement of the volume of fluid displaced by a submerged object.
The difference in whether a ball of tin foil sinks or floats is determined by its density compared to that of the surrounding fluid.
Archimedes figured out that an object will float if its weight is less than the weight of the fluid it displaces.
An object with positive buoyancy will float when placed in water.
An object with negative buoyancy will sink when placed in water.
An object with neutral buoyancy will remain suspended at a specific depth when placed in water.
Neutral buoyancy is useful in applications like submarines and hot air balloons where stable positioning in a fluid is required.

Learn more about Buoyancy and Archimedes' Principle here:

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