Pearson Geometry Common Core, 2011
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Pearson Geometry Common Core, 2011 View details
4. Deductive Reasoning
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Exercise 25 Page 111

Write two statements such that we can use Law of Detachment to identify the flavor of a quark with a charge of - 13 e and rest energy 540 MeV.

Flavor: Strange
Reasoning: See solution.

Practice makes perfect

The following table shows how to categorize quarks by their flavors.

Rest Energy and Charge of Quarks
Rest Energy (MeV) 360 360 1500 540 173 000 5000
Electric Charge (e) +2/3 -1/3 +2/3 -1/3 +2/3 -1/3
Flavor Up Down Charmed Strange Top Bottom
Let's write two statements such that we can use Law of Detachment to identify the flavor of a quark with a charge of - 13 e and rest energy 540 MeV. The Law of Detachment says that:

If the hypothesis of a conditional is true, then the conclusion is true. We can use symbols to state the Law of Detachment. If p → q &is true and p &is true, then q &is true. In order to use the Law of Detachment, we need a conditional statement and its hypothesis, which leads us to the flavor of the quark. Thus, the statements should be as the following.

  • Statement I: If a quark have a charge of - 13 e and rest energy 540 MeV, then its flavor type is strange.
  • Statement II: A quark have a charge of - 13 e and rest energy 540 MeV.

Thus, Statement II matches the hypothesis of Statement I. Applying the Law of Detachment, we can make a valid conclusion. Conclusion The quark's flavor type is strange.