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Which of the following engines can achieve the maximum specific impulse of 5000 s?

Which of the following engines can achieve the maximum specific impulse of 5000 s? Correct Answer Ion-electrostatic

Ion-electrostatic engine has a specific impulse of 1200-5000 s. Nuclear fission type engines have Isp of 500-860 s, while solar heating engines have it around 400-700 s.

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