Examkin

Question

Difficulty: MediumMost Strongly Supported Questions

Any satellite or debris fragment in Earth orbit below an altitude of 600 kilometers experiences significant atmospheric drag. Any object experiencing significant atmospheric drag will naturally re-enter Earth's atmosphere and burn up within 25 years. The recent Zenith satellite breakup occurred at an altitude of 500 kilometers. Objects resulting from a satellite breakup initially occupy the same altitude as the breakup event itself, and none of the debris fragments from the Zenith breakup possess propulsion systems capable of raising their altitude.

Based on the information above, which of the following statements are most strongly supported? (Select all that apply)

  1. The debris fragments resulting from the Zenith breakup will naturally re-enter Earth's atmosphere within 25 years.Answer
  2. At the time it broke up, the Zenith satellite was experiencing significant atmospheric drag.Answer
  3. C
    Any object in Earth orbit that naturally re-enters the atmosphere within 25 years must have been located at an altitude below 600 kilometers.
  4. D
    Most debris fragments currently in orbit below 600 kilometers are the result of satellite breakups.
  5. E
    The Zenith satellite broke up because of the significant atmospheric drag it experienced at an altitude of 500 kilometers.

Answer

The most strongly supported statements are that the debris fragments resulting from the Zenith breakup will naturally re-enter Earth's atmosphere within 25 years, and that at the time it broke up, the Zenith satellite was experiencing significant atmospheric drag.
The correct statements are direct logical deductions from the text. Because the Zenith satellite was at 500 kilometers, it fell under the rule that anything below 600 kilometers experiences significant drag. Furthermore, because its debris fragments share that altitude and cannot propel themselves higher, they also fall under the rule that objects below 600 kilometers experience significant drag, which guarantees they will re-enter the atmosphere within 25 years.

Step-by-Step Solution

1
Analyze the conditional rules established in the first two sentences.
Rule 1: If object is < 600km -> object experiences significant drag. Rule 2: If object experiences significant drag -> object re-enters within 25 years. Chain: If object is < 600km -> object re-enters within 25 years.
Mapping conditional statements is necessary to determine what inferences can be strictly proven.
2
Apply the factual premises to the conditional chain.
Fact: Zenith broke up at 500km. Therefore, Zenith was < 600km, so it experienced significant drag. Fact: Fragments start at 500km and cannot go higher. Therefore, fragments are < 600km, so they will re-enter within 25 years.
Inferences must be derived by applying the specific facts to the established rules without bringing in outside assumptions.
3
Evaluate the options against the derived inferences.
The correct options match the derived inferences exactly. Incorrect options rely on logical fallacies such as illegal reversals or unwarranted causal claims.
This confirms that the selected answers are structurally sound and supported solely by the text.

Key Concept

Chaining conditional statements and applying specific factual premises to derive guaranteed conclusions.
Rate this question

Topics

Most Strongly Supported Questions

More questions from this topic