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Zorluk: ZorStrengthening Arguments

To mitigate orbital space debris, a space agency proposes requiring all low-Earth-orbit commercial satellites to deploy drag sails—expandable sheets designed to increase atmospheric drag and accelerate reentry—at the end of their operational lifespan. Analysts calculate that drag sails will reduce the average deorbit time of retired satellites from thirty years to less than three years. Therefore, requiring drag sails on all future low-Earth-orbit satellites will substantially lower the total frequency of orbital collisions in low-Earth orbit over the coming decade. Which of the following, if true, provides the strongest support for the space agency's conclusion?

  1. The increase in a satellite's cross-sectional area during drag sail deployment creates a cumulative collision risk over three years that is significantly lower than the risk accumulated over thirty years of unassisted orbital decay.Cevap
  2. B
    Deploying a drag sail substantially expands a satellite's cross-sectional profile, significantly increasing the likelihood that it will collide with operational spacecraft during its three-year descent.
  3. C
    Recent advances in lightweight material engineering are projected to reduce the manufacturing and installation costs of drag sails over the next ten years.
  4. D
    Satellite tracking records indicate that historical surges in satellite deployments co-occurred with periods of heightened upper-atmosphere thermal expansion.
  5. E
    Ground-based radar stations are currently capable of tracking operational commercial satellites with high navigational precision.

Cevap

The argument is most strongly supported by the premise that the cumulative collision risk over a three-year drag-sail descent is significantly lower than the risk accumulated over thirty years of unassisted orbital decay.
The correct answer provides crucial support by eliminating a potential counter-argument. Because drag sails work by deploying large sheets, they increase a satellite's cross-sectional area, making it a larger target for orbital debris. If the increased target size made collisions much more likely during those three years, the net collision rate might stay the same or even increase. Establishing that the three-year cumulative risk is significantly lower than the thirty-year baseline risk confirms that the proposal achieves its stated goal.

Adım Adım Çözüm

1
Deconstruct the argument into core components
Premise: Drag sails shorten satellite deorbit time from 30 years to under 3 years by increasing surface area and atmospheric drag. Conclusion: Mandating drag sails will substantially lower the total frequency of low-Earth orbit collisions over the next decade.
Isolating the premise and conclusion reveals the underlying assumption that shorter deorbit time translates directly into fewer total collisions.
2
Identify the central assumption and logical vulnerability
The argument assumes that deploying a drag sail—which drastically expands the physical size (cross-sectional area) of the satellite—does not inadvertently increase the risk of collision per year so dramatically that it offsets the benefit of a shorter timeframe.
A larger object presents a bigger target for space debris, so reducing time in orbit helps only if the increased size does not create an equal or greater net danger.
3
Evaluate which choice validates this assumption or rules out the key vulnerability
The statement confirming that the three-year risk with a drag sail is significantly lower than the thirty-year risk of unassisted decay directly confirms that the net collision probability actually decreases.
By verifying that the increased cross-sectional area does not outweigh the benefit of reduced orbital lifespan, this statement provides necessary support for the author's claim.

Anahtar Kavram

Strengthening by ruling out an alternative counter-mechanism or validating an implicit net-benefit assumption.
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Strengthening Arguments

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