To analyze Jeff's situation, we can apply the concept of charging through contact and the behavior of materials concerning electrons and protons.
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The leather jacket has a tendency to attract electrons. - This statement is true. When materials are rubbed against each other, one material can lose electrons and become positively charged, while the other gains those electrons and becomes negatively charged. In this scenario, it seems that the leather jacket may have caused the sweater to gain electrons and thus become negatively charged.
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The leather jacket has a tendency to attract protons. - This statement is false. Protons are bound within atomic nuclei and do not move freely like electrons. Hence, materials do not attract protons.
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The sweater has a tendency to repel electrons. - This statement is false. A negatively charged object, like the sweater in this scenario, would actually repel other negatively charged objects (electrons) and attract positively charged objects.
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The leather jacket has a lower tendency to repel electrons than the sweater. - This statement is true. Since the sweater has become charged negatively, it would inherently repel electrons, while the leather jacket, which likely has a positive charge or is less negatively charged, would repel electrons less strongly.
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The sweater has a tendency to attract protons. - This statement is false. As mentioned earlier, charged objects interact with other charges via their electric fields but do not have a tendency to attract protons.
Based on the analysis, the true statements about Jeff's situation are:
- The leather jacket has a tendency to attract electrons.
- The leather jacket has a lower tendency to repel electrons than the sweater.