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2. How you can explain someone why the weight of a person appears lighter in a liquid than in air.

3. Do you have evidence for particle motion in liquids? Explain.

4. Do you have evidence for space between particles of liquids? Think about the experiment that may provide such an evidence. Explain Why are mass and volume not considered characteristic physical properties, but density (which is calculated from mass and volume) is?

5. Consider the conversation between two students about why the water level rises when a person sits down in a bathtub filled with water. Why are mass and volume not considered characteristic physical properties, but density (which is calculated from mass and volume) does?

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